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Objective Compare the performance differences of threeprotein content determination kits (Lowry method of Aimei, BCA method ofKangwei, and BCA method of Thermo Fisher) in detecting micro $\left({0 \sim {20\mu}\mathrm{g}/\mathrm{{mL}}}\right)$ protein. Select the mostaccurate and reliable reagent kit for the detection of trace proteinsamples. Methods Use these three test kits to detect micro proteincontent, compare their accuracy, sensitivity, linearity andrepeatability, and evaluate their equivalence. Results The recoveryrates of the three test kits for detecting trace amounts $\left({{1.25}\sim {20\mu}\mathrm{g}/\mathrm{{mL}}}\right)$ of protein were all withinthe range of 75%~120%, demonstrating qualified accuracy; Thermo FisherBCA meets the acceptable precision range (RSD $\leq 6\%$ ) in the range of ${2.5\mu }\mathrm{g}/\mathrm{{mL}}$ to ${20\mu }\mathrm{g}/\mathrm{{mL}}$ ,while Aimei Lowry and Kangwei BCA meet the acceptable precision range(RSD $\leq 6\%$ ) in the range of ${5\mu }\mathrm{g}/\mathrm{{mL}}$ to ${20\mu }\mathrm{g}/\mathrm{{mL}}$ ,demonstrating good repeatability; the correlation coefficient ${\mathrm{R}}^{2}$ of the standard curvesof the three test kits $\left({0\sim {20}\mathrm{{\mu g}}/\mathrm{{mL}}}\right)$ are all higherthan 0.980 . The linearity of Aimei Lowry is slightly poor, with ${\mathrm{R}}^{2}$ of 0.981 . The linearityof Kangwei BCA is qualified, with ${\mathrm{R}}^{2}$ of 0.991 . The linearityof Thermo Fisher BCA is the best, with ${\mathrm{R}}^{2}$ of 0.993; The abovemethodological validation results indicate that the minimumquantification limits for the sensitivity of the three test kits are ${5\mu }\mathrm{g}/\mathrm{{mL}}$ forthe Aimei Lowry method, ${5\mu}\mathrm{g}/\mathrm{{mL}}$ for the Kangwei BCA method, and ${2.5\mu }\mathrm{g}/\mathrm{{mL}}$ for theThermo Fisher BCA method, respectively; Paired curves of values detectedby three reagent kits for the same series of BSA concentrations andtheir correlation coefficients were all higher than 0.990 . ConclusionThrough experiments, we found that each reagent kit exhibited differentperformance in different concentrations of BSA samples, among which theThermo Fisher BCA method performed the best in terms of accuracy andrepeatability, and there was a certain correlation between these threemethods.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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