[ Objective] This study aimed to explore a Tricine-SDS-PAGE method for separation and purification of Periplaneta Americana small peptides. [ Method] By comparing the separation effects of three types of gels with dif...[ Objective] This study aimed to explore a Tricine-SDS-PAGE method for separation and purification of Periplaneta Americana small peptides. [ Method] By comparing the separation effects of three types of gels with different ratios on P. Americana small peptides, an appropriate Tricine-SDS-PAGE method for separation of small peptides was established. [ Result] Standard low molecular weight Marker was preliminarily separated to a certain extent with polyacrylamide gel electraphoresis, while the sample mixture was not separated due to the different levels of aggregation in separating gel, spacer gel and stacking gel. [Condusion] More appropriate polyacrylamide gel electrephoresis separation method or other better separation methods were to be further explored for separating peptide mixture with smaller molecular weight.展开更多
目的建立一种定量检测人体泪液中溶菌酶含量的方法。方法通过改进的Tricine-SDS-PAGE电泳,分析正常人体天然泪液中分子量在3~30 k Da的蛋白质分布,使泪液溶菌酶与其它泪液蛋白有效分离,用Image J软件对溶菌酶电泳条带进行灰度分析,定量...目的建立一种定量检测人体泪液中溶菌酶含量的方法。方法通过改进的Tricine-SDS-PAGE电泳,分析正常人体天然泪液中分子量在3~30 k Da的蛋白质分布,使泪液溶菌酶与其它泪液蛋白有效分离,用Image J软件对溶菌酶电泳条带进行灰度分析,定量测定其中溶菌酶的含量。结果泪液溶菌酶和其它小分子蛋白可用改进的Tricine-SDS-PAGE电泳有效分离,对于人体泪液中的溶菌酶检测专属性良好;上样量10~30μg范围内,溶菌酶含量和电泳条带灰度面积线性关系良好(r=0.9934);分析17例人体泪液的样本,其中溶菌酶的含量在1.38~3.07 mg/m L。结论改进的Tricine-SDS-PAGE电泳法简单直观,并能批量性的一次分析多个样本,可用于科研及临床上人体泪液中溶菌酶的含量检测。展开更多
基金Supported by National Natural Science Foundation of China ( 30560181)Key Industry Innovation Project of Yunnan Province ( 2008IF012)
文摘[ Objective] This study aimed to explore a Tricine-SDS-PAGE method for separation and purification of Periplaneta Americana small peptides. [ Method] By comparing the separation effects of three types of gels with different ratios on P. Americana small peptides, an appropriate Tricine-SDS-PAGE method for separation of small peptides was established. [ Result] Standard low molecular weight Marker was preliminarily separated to a certain extent with polyacrylamide gel electraphoresis, while the sample mixture was not separated due to the different levels of aggregation in separating gel, spacer gel and stacking gel. [Condusion] More appropriate polyacrylamide gel electrephoresis separation method or other better separation methods were to be further explored for separating peptide mixture with smaller molecular weight.