Article(id=1321170216994853321, tenantId=1146029695717560320, journalId=1260987677001138203, issueId=1321170163563614210, articleNumber=null, orderNo=null, doi=10.13386/j.issn1002-0306.2024110430, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1733068800000, receivedDateStr=2024-12-02, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1792921125886, onlineDateStr=2026-10-25, pubDate=1769875200000, pubDateStr=2026-02-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792921125886, onlineIssueDateStr=2026-10-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792921125886, creator=13701087609, updateTime=1792921125886, updator=13701087609, issue=Issue{id=1321170163563614210, tenantId=1146029695717560320, journalId=1260987677001138203, year='2026', volume='47', issue='3', pageStart='1', pageEnd='497', issueExtLink='null', onlineDate='null', pubDate='1769875200000', pubDateStr='2026-02-01', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792921113148, creator='13701087609', updateTime=1792921113148, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=52, endPage=61, ext={EN=ArticleExt(id=1321170218508997066, articleId=1321170216994853321, tenantId=1146029695717560320, journalId=1260987677001138203, language=EN, title=Optimization of Apple Polyphenol Oxidase Purification Process Using Ethanol/Acetone Mixed Solvent Precipitation Guided by Molecular Dynamics Simulations, columnId=1261336277291548795, journalTitle=Science and Technology of Food Industry, columnName=Research and Investigation, runingTitle=null, highlight=null, articleAbstract=
Apple polyphenol oxidase (PPO), a key enzyme triggering enzymatic browning in fruits and vegetables, requires efficient purification for both mechanistic studies and industrial applications. To address the limitations of conventional single precipitants (e.g., high solvent consumption and low enzyme activity recovery), this study aimed to develop a cost-effective PPO purification strategy by integrating mixed solvent precipitation guided by molecular dynamics (MD) simulations with chromatographic techniques. First, MD simulations predicted the interaction mechanisms between PPO and precipitants (ammonium sulfate, ethanol, acetone, and ethanol/acetone mixtures). Further purification was then conducted using DEAE-Sepharose Fast Flow ion-exchange chromatography and Sephadex G-100 gel filtration. The experimental validation demonstrated that the ethanol/acetone mixed solvent precipitant exhibited superior binding affinity. Single-step mixed solvent precipitation (ratio of ethanol/acetone 1:1, v/v) at 50% solvent concentration reduced precipitant usage by 33.33%, while achieving 89.85% enzyme activity recovery and a 1.24-fold purification. After chromatography, the PPO specific activity reached 156362.78 U/mg, with a purification fold of 18.33. SDS-PAGE analysis confirmed a single protein band at approximately 28 kDa. The mixed solvent precipitation approach proposed in this study based on MD provides a novel approach for PPO purification, offering critical implications for advancing enzymatic browning control technologies in fruit and vegetable processing industries.
, authors=Xiaoxue SHI
1, 2, 3, 4, Yanbing WEN
1, 2, 3, 4, Xiangming QI
1, 2, 3, 4, *, authorsList=Xiaoxue SHI, Yanbing WEN, Xiangming QI, authorCompany=null, correspAuthors=Xiangming QI, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright © 2026 Science and Technology of Food Industry. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1321170219859562967, articleId=1321170216994853321, tenantId=1146029695717560320, journalId=1260987677001138203, language=CN, title=基于分子动力学模拟的乙醇/丙酮复合沉淀法优化苹果多酚氧化酶纯化工艺, columnId=1261336277849391232, journalTitle=食品工业科技, columnName=研究与探讨, runingTitle=null, highlight=null, articleAbstract=
苹果多酚氧化酶(polyphenol oxidase,PPO)是引发果蔬酶促褐变的关键酶,其高效分离纯化对褐变抑制机制研究及工业化应用具有重要意义。针对传统单一沉淀剂用量大、酶活回收率低的问题,本研究旨在通过分子动力学模拟辅助设计复合沉淀体系,结合层析技术优化苹果PPO分离纯化工艺,以实现低成本、高效率的酶制备。首先通过分子动力学模拟预测单一沉淀剂(硫酸铵、乙醇、丙酮)及复合体系的沉淀效果,再进一步采用DEAE-Sepharose Fast Flow离子交换层析与Sephadex G-100层析进行纯化。实验结果表明:乙醇/丙酮复合沉淀剂与苹果PPO的相互作用更优,50%浓度乙醇/丙酮(以1:1的比例混合)单级沉淀PPO可减少33.33%沉淀剂用量,同时获得了89.85%酶活回收率和1.24纯化倍数;层析后PPO比酶活达156362.78 U/mg,纯化倍数达到18.33。SDS-PAGE电泳显示单一条带(分子量约为28 kDa)。本研究基于分子动力学模拟提出的复合沉淀策略为PPO的提供了新思路,对果蔬加工中酶促褐变控制技术的开发具有参考价值。
, authors=时小雪
1, 2, 3, 4, 闻彦兵
1, 2, 3, 4, 齐祥明
1, 2, 3, 4, *, authorsList=时小雪, 闻彦兵, 齐祥明, authorCompany=null, correspAuthors=齐祥明, authorNote=
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, copyrightStatement=版权所有 © 2026《食品工业科技》编辑部, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=gb37Ks8XEMGnskR5XPSz2w==, magXml=607TsqClDn6TaRl5+h7Xnw==, pdfUrl=null, pdf=Cj7a80EbxXV+dwommS0Qxw==, pdfFileSize=5635774, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=zycjJKMQlLJD0o2ghL0A/g==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=OJeZdGKmO8al39H1fs1WoQ==, mapNumber=null, fund=null)}, authors=[Author(id=1321170223848346085, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=shixiaoxue9286@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1321170223974175210, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, authorId=1321170223848346085, language=EN, stringName=Xiaoxue SHI, firstName=Xiaoxue, middleName=null, lastName=SHI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, 4, address=
1State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
2Laboratory for Marine Drugs and Bioproducts, Qingdao Marine Science and Technology Center, Qingdao 266237, China
3Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China
4Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1321170224041284075, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, authorId=1321170223848346085, language=CN, stringName=时小雪, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, 4, address=
1中国海洋大学食品科学与工程学院,海洋食品加工与安全控制全国重点实验室,山东青岛 266404
2青岛海洋科技中心海洋药物与生物制品功能实验室,山东青岛 266237
3青岛市食品生物技术重点实验室,山东青岛 266404
4中国轻工业水产品生物加工重点实验室,山东青岛 266404, bio={"content":"
时小雪(2001−),女,硕士研究生,研究方向:食品非热加工技术,E-mail:shixiaoxue9286@163.com
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时小雪(2001−),女,硕士研究生,研究方向:食品非热加工技术,E-mail:shixiaoxue9286@163.com
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1, 2, 3, 4, address=
1State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
2Laboratory for Marine Drugs and Bioproducts, Qingdao Marine Science and Technology Center, Qingdao 266237, China
3Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China
4Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1321170224339079667, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, authorId=1321170224137753069, language=CN, stringName=闻彦兵, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, 4, address=
1中国海洋大学食品科学与工程学院,海洋食品加工与安全控制全国重点实验室,山东青岛 266404
2青岛海洋科技中心海洋药物与生物制品功能实验室,山东青岛 266237
3青岛市食品生物技术重点实验室,山东青岛 266404
4中国轻工业水产品生物加工重点实验室,山东青岛 266404, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1321170220136387032, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, xref=1, ext=[AuthorCompanyExt(id=1321170220148969945, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, companyId=1321170220136387032, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China), AuthorCompanyExt(id=1321170220161552858, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, companyId=1321170220136387032, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1中国海洋大学食品科学与工程学院,海洋食品加工与安全控制全国重点实验室,山东青岛 266404)]), AuthorCompany(id=1321170223579910619, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, xref=2, ext=[AuthorCompanyExt(id=1321170223588299228, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, companyId=1321170223579910619, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2青岛海洋科技中心海洋药物与生物制品功能实验室,山东青岛 266237)]), AuthorCompany(id=1321170223672185310, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, xref=3, ext=[AuthorCompanyExt(id=1321170223680573919, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, companyId=1321170223672185310, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3青岛市食品生物技术重点实验室,山东青岛 266404)]), AuthorCompany(id=1321170223760265697, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, xref=4, ext=[AuthorCompanyExt(id=1321170223768654306, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, companyId=1321170223760265697, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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4中国轻工业水产品生物加工重点实验室,山东青岛 266404)])]), Author(id=1321170224418771445, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=qixm@ouc.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=1, authorType=1, ext={EN=AuthorExt(id=1321170224498463226, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, authorId=1321170224418771445, language=EN, stringName=Xiangming QI, firstName=Xiangming, middleName=null, lastName=QI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, 4, *, address=
1State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
2Laboratory for Marine Drugs and Bioproducts, Qingdao Marine Science and Technology Center, Qingdao 266237, China
3Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China
4Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1321170224565572091, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, authorId=1321170224418771445, language=CN, stringName=齐祥明, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, 4, *, address=
1中国海洋大学食品科学与工程学院,海洋食品加工与安全控制全国重点实验室,山东青岛 266404
2青岛海洋科技中心海洋药物与生物制品功能实验室,山东青岛 266237
3青岛市食品生物技术重点实验室,山东青岛 266404
4中国轻工业水产品生物加工重点实验室,山东青岛 266404, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1321170220136387032, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, xref=1, ext=[AuthorCompanyExt(id=1321170220148969945, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, companyId=1321170220136387032, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1中国海洋大学食品科学与工程学院,海洋食品加工与安全控制全国重点实验室,山东青岛 266404)]), AuthorCompany(id=1321170223579910619, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, xref=2, ext=[AuthorCompanyExt(id=1321170223588299228, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, companyId=1321170223579910619, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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Salacca zalacca (Gaertn.) Voss][J]. Food Chemistry, 2013, 136(2): 407−414., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1321170220136387032, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, xref=1, ext=[AuthorCompanyExt(id=1321170220148969945, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, companyId=1321170220136387032, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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Precipitation of PPO by ammonium sulphate at different saturation levels, figureFileSmall=5pxB9GlFmvT4/sjflkbYDw==, figureFileBig=zycjJKMQlLJD0o2ghL0A/g==, tableContent=null), ArticleFig(id=1321170227291869705, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=图1, caption=
不同饱和度硫酸铵沉淀PPO注:(a)酶活回收率,(b)蛋白回收率;不同大写字母表示沉淀组差异显著(P<0.05),不同小写字母表示上清组差异显著(P<0.05),图2同。
, figureFileSmall=5pxB9GlFmvT4/sjflkbYDw==, figureFileBig=zycjJKMQlLJD0o2ghL0A/g==, tableContent=null), ArticleFig(id=1321170227547722250, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Fig.2, caption=
Precipitation of PPO with different concentrations of ethanol and acetone, figureFileSmall=Bmgjce8M1H5nxh9GfhPzxg==, figureFileBig=rAPHMod9DvCthqJvHweepA==, tableContent=null), ArticleFig(id=1321170227627414027, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=图2, caption=
不同浓度乙醇、丙酮沉淀PPO注:(a,c)酶活回收率,(b,d)蛋白回收率。
, figureFileSmall=Bmgjce8M1H5nxh9GfhPzxg==, figureFileBig=rAPHMod9DvCthqJvHweepA==, tableContent=null), ArticleFig(id=1321170227707105804, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Fig.3, caption=
Results of molecular dynamics simulation, figureFileSmall=lqu90lNmA//MuYM7fK8PAg==, figureFileBig=5gXU3KfhjVxtbeL9dk/Nfg==, tableContent=null), ArticleFig(id=1321170227790991885, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=图3, caption=
分子动力学模拟结果注:(a)SASA,(b)RMSD,(c)Rg,(d)总能量。
, figureFileSmall=lqu90lNmA//MuYM7fK8PAg==, figureFileBig=5gXU3KfhjVxtbeL9dk/Nfg==, tableContent=null), ArticleFig(id=1321170227866489358, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Fig.4, caption=
Docking images of PPO molecules and tertiary structure of PPO after molecular dynamics simulation, figureFileSmall=V9Z5B1mYK+s1PR8j51kCTw==, figureFileBig=pchKU4wbgyewJEaP1WNpaQ==, tableContent=null), ArticleFig(id=1321170227937792527, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=图4, caption=
PPO分子对接图像以及分子动力学模拟后PPO三级结构注:(a)单结合乙醇,(b)单结合丙酮,(c)结合乙醇+丙酮,(d)单纯PPO;负值(蓝色)亲水,正值(棕色)疏水。
, figureFileSmall=V9Z5B1mYK+s1PR8j51kCTw==, figureFileBig=pchKU4wbgyewJEaP1WNpaQ==, tableContent=null), ArticleFig(id=1321170228021678608, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Fig.5, caption=
Precipitation of PPO by mixed ethanol/acetone solutions of different concentrations and ratios, figureFileSmall=pe1guTU1/Gz98ssv6PpTXQ==, figureFileBig=bZ+ZQBOW/5kPFJZqtt2QOw==, tableContent=null), ArticleFig(id=1321170228101370385, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=图5, caption=
不同浓度和比例的乙醇/丙酮混合溶液沉淀PPO注:(a)酶活回收率,(b)蛋白回收率;不同大写字母表示组间差异显著(P<0.05),不同小写字母表示组内差异显著(P<0.05)。
, figureFileSmall=pe1guTU1/Gz98ssv6PpTXQ==, figureFileBig=bZ+ZQBOW/5kPFJZqtt2QOw==, tableContent=null), ArticleFig(id=1321170228181062162, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Fig.6, caption=
Purification steps of apple PPO, figureFileSmall=ZoD84J5YK/Zx5jA8opW++g==, figureFileBig=+DgFyOPtP07dqwkogxWiug==, tableContent=null), ArticleFig(id=1321170228248171027, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=图6, caption=
苹果PPO纯化步骤注:(a)DEAE Sepharose Fast Flow洗脱曲线,(b)Sephadex G-100洗脱曲线,(c)PPO的SDS-PAGE图。
, figureFileSmall=ZoD84J5YK/Zx5jA8opW++g==, figureFileBig=+DgFyOPtP07dqwkogxWiug==, tableContent=null), ArticleFig(id=1321170228315279892, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Table 1, caption=
Purification multiplicity of PPO after ammonium sulphate precipitation at different saturation levels
, figureFileSmall=null, figureFileBig=null, tableContent=
| 硫酸铵饱和度(%) | 纯化倍数 |
|---|
| 10 | 3.39±0.37a |
| 20 | 2.15±0.10b |
| 30 | 1.43±0.10c |
| 40 | 0.61±0.03de |
| 50 | 0.45±0.02ef |
| 60 | 0.27±0.07f |
| 70 | 0.19±0.01f |
| 80 | 0.61±0.01de |
| 90 | 0.76±0.03d |
), ArticleFig(id=1321170228382388757, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=表1, caption=
不同饱和度硫酸铵沉淀后PPO纯化倍数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 硫酸铵饱和度(%) | 纯化倍数 |
|---|
| 10 | 3.39±0.37a |
| 20 | 2.15±0.10b |
| 30 | 1.43±0.10c |
| 40 | 0.61±0.03de |
| 50 | 0.45±0.02ef |
| 60 | 0.27±0.07f |
| 70 | 0.19±0.01f |
| 80 | 0.61±0.01de |
| 90 | 0.76±0.03d |
), ArticleFig(id=1321170228445303318, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Table 2, caption=
Purification multiplicity of PPO after precipitation with different concentrations of ethanol and acetone
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| 乙醇/丙酮浓度(%) | 纯化倍数(乙醇) | 纯化倍数(丙酮) |
|---|
| 10 | 0.30±0.02e | 0.52±0.05e |
| 20 | 0.39±0.07de | 0.41±0.01f |
| 30 | 0.51±0.03d | 0.39±0.02f |
| 40 | 0.69±0.07c | 0.73±0.04d |
| 50 | 1.09±0.05b | 0.84±0.03c |
| 60 | 1.23±0.06a | 1.25±0.05a |
| 70 | 1.14±0.07ab | 1.06±0.01b |
| 80 | 1.27±0.00a | 1.32±0.02a |
), ArticleFig(id=1321170228512412183, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=表2, caption=
不同浓度乙醇、丙酮沉淀后PPO纯化倍数
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| 乙醇/丙酮浓度(%) | 纯化倍数(乙醇) | 纯化倍数(丙酮) |
|---|
| 10 | 0.30±0.02e | 0.52±0.05e |
| 20 | 0.39±0.07de | 0.41±0.01f |
| 30 | 0.51±0.03d | 0.39±0.02f |
| 40 | 0.69±0.07c | 0.73±0.04d |
| 50 | 1.09±0.05b | 0.84±0.03c |
| 60 | 1.23±0.06a | 1.25±0.05a |
| 70 | 1.14±0.07ab | 1.06±0.01b |
| 80 | 1.27±0.00a | 1.32±0.02a |
), ArticleFig(id=1321170228571132440, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Table 3, caption=
Quantitative data from molecular dynamics simulation results
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| 体系 | PPO | 乙醇 | 丙酮 | 乙醇/丙酮 |
|---|
| SASA均值(nm2) | 100.82±1.56 | 101.27±1.83 | 102.82±2.01 | 104.73±1.98 |
| RMSD均值(nm) | 0.16±0.01 | 0.20±0.02 | 0.18±0.02 | 0.24±0.03 |
| Rg均值(nm) | 2.21±0.01 | 2.22±0.01 | 2.22±0.01 | 2.23±0.01 |
| 总能量均值(kJ/mol) | −783332.69±1475.72 | −790115.77±1480.72 | −790002.56±1491.9 | −790176.99±1485.57 |
), ArticleFig(id=1321170228642435609, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=表3, caption=
分子动力学模拟结果的定量数据
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| 体系 | PPO | 乙醇 | 丙酮 | 乙醇/丙酮 |
|---|
| SASA均值(nm2) | 100.82±1.56 | 101.27±1.83 | 102.82±2.01 | 104.73±1.98 |
| RMSD均值(nm) | 0.16±0.01 | 0.20±0.02 | 0.18±0.02 | 0.24±0.03 |
| Rg均值(nm) | 2.21±0.01 | 2.22±0.01 | 2.22±0.01 | 2.23±0.01 |
| 总能量均值(kJ/mol) | −783332.69±1475.72 | −790115.77±1480.72 | −790002.56±1491.9 | −790176.99±1485.57 |
), ArticleFig(id=1321170228730515994, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Table 4, caption=
Purification multiplicity of PPO after precipitation from different proportions of ethanol/acetone mixture at 50% concentration
, figureFileSmall=null, figureFileBig=null, tableContent=
| 乙醇/丙酮比例 | 2:8 | 4:6 | 5:5 | 6:4 | 8:2 |
|---|
| 纯化倍数 | 1.16±0.05ab | 1.19±0.05ab | 1.24±0.04a | 1.16±0.06ab | 1.07±0.02b |
), ArticleFig(id=1321170228785041947, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=表4, caption=
50%浓度下不同比例乙醇/丙酮混合溶液沉淀后PPO纯化倍数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 乙醇/丙酮比例 | 2:8 | 4:6 | 5:5 | 6:4 | 8:2 |
|---|
| 纯化倍数 | 1.16±0.05ab | 1.19±0.05ab | 1.24±0.04a | 1.16±0.06ab | 1.07±0.02b |
), ArticleFig(id=1321170228864733724, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=EN, label=Table 5, caption=
Purification steps of apple polyphenol oxidase
, figureFileSmall=null, figureFileBig=null, tableContent=
| 纯化步骤 | 蛋白(mg/mL) | 酶活(U/mL) | 比酶活(U/mg) | 纯化倍数 |
|---|
| 粗酶 | 0.10±1.79×10−3 | 845.83±89.77 | 8530.21±742.35 | 1.00 |
| 乙醇/丙酮混合沉淀 | 0.12±2.24×10−3 | 1535.83±127.04 | 12939.02±1242.15 | 1.52 |
| DEAE-Sepharose FF层析 | 0.10±2.67×10−3 | 6577.50±173.55 | 66140.39±2245.57 | 7.75 |
| Sephadex G-100层析 | 0.17±1.79×10−3 | 27000.00±212.13 | 156362.78±753.50 | 18.33 |
), ArticleFig(id=1321170229036700189, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1321170216994853321, language=CN, label=表5, caption=
苹果多酚氧化酶纯化步骤
, figureFileSmall=null, figureFileBig=null, tableContent=
| 纯化步骤 | 蛋白(mg/mL) | 酶活(U/mL) | 比酶活(U/mg) | 纯化倍数 |
|---|
| 粗酶 | 0.10±1.79×10−3 | 845.83±89.77 | 8530.21±742.35 | 1.00 |
| 乙醇/丙酮混合沉淀 | 0.12±2.24×10−3 | 1535.83±127.04 | 12939.02±1242.15 | 1.52 |
| DEAE-Sepharose FF层析 | 0.10±2.67×10−3 | 6577.50±173.55 | 66140.39±2245.57 | 7.75 |
| Sephadex G-100层析 | 0.17±1.79×10−3 | 27000.00±212.13 | 156362.78±753.50 | 18.33 |
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