An effective cation-exchange chromatographic method for lysozyme isolation from chicken egg white is presented, using supermacroporous cryogel grafted with sulfo functional groups. The chromatographic processes were c...An effective cation-exchange chromatographic method for lysozyme isolation from chicken egg white is presented, using supermacroporous cryogel grafted with sulfo functional groups. The chromatographic processes were carried out by one-step and sequential elution, respectively. Sodium phosphate buffer (pH 7.8) containing different concentrations of NaC1 is used as elution agent. The corresponding breakthrough characteristics and elution behaviors in the cryogel bed were investigated and analyzed. Purity of lysozyme in the elution effluent was assayed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The maximum purity of the obtained lysozyme was about 96%, and the cryogel is demonstrated as a potential separation medium for purification of high-purit lysozyme from chicken egg white.展开更多
利用肽配体库技术(CPLL)研究了蛋清中的低丰度蛋白质组。考察了盐浓度和洗脱顺序差异对CPLL富集效率的影响。结果表明:盐浓度越高,蛋清蛋白质溶液的离子相互作用越强。利用洗脱溶液解离差异,采用先HOS(有机水溶液)后尿素CHAPS(3-[3-(胆...利用肽配体库技术(CPLL)研究了蛋清中的低丰度蛋白质组。考察了盐浓度和洗脱顺序差异对CPLL富集效率的影响。结果表明:盐浓度越高,蛋清蛋白质溶液的离子相互作用越强。利用洗脱溶液解离差异,采用先HOS(有机水溶液)后尿素CHAPS(3-[3-(胆酰胺丙基)二甲氨基]-1-丙磺酸内盐)的洗脱顺序,溶菌酶能够得到高效分离。保持蛋清的原p H 8.8,25 mmol/L KH2PO4,150 mmol/L Na Cl,尿素CHAPS洗脱,是CPLL提供高效富集的前提。通过分析CPLL富集前后的十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDSPAGE)条带差异,采用线性离子阱(LTQ)质谱在蛋清中检出45种低丰度蛋白质,其中两种未见报道。对蛋清中低丰度蛋白质亚细胞的定位分析发现,蛋清蛋白质的分泌蛋白居多。研究结果表明,CPLL技术能够实现蛋清中低丰度蛋白质的高效富集,分析深度达到亚细胞水平。展开更多
基金Supported by the National lqatural Science Foundation of China (21036005, 20876145), the Science and Technology Cooperation Project between China-Europe Country's Governments from the Ministry of Science and Technology of China (1017) and the Natural Science Foundation of Zhejiang Provincial (Y4080326).
文摘An effective cation-exchange chromatographic method for lysozyme isolation from chicken egg white is presented, using supermacroporous cryogel grafted with sulfo functional groups. The chromatographic processes were carried out by one-step and sequential elution, respectively. Sodium phosphate buffer (pH 7.8) containing different concentrations of NaC1 is used as elution agent. The corresponding breakthrough characteristics and elution behaviors in the cryogel bed were investigated and analyzed. Purity of lysozyme in the elution effluent was assayed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The maximum purity of the obtained lysozyme was about 96%, and the cryogel is demonstrated as a potential separation medium for purification of high-purit lysozyme from chicken egg white.
文摘利用肽配体库技术(CPLL)研究了蛋清中的低丰度蛋白质组。考察了盐浓度和洗脱顺序差异对CPLL富集效率的影响。结果表明:盐浓度越高,蛋清蛋白质溶液的离子相互作用越强。利用洗脱溶液解离差异,采用先HOS(有机水溶液)后尿素CHAPS(3-[3-(胆酰胺丙基)二甲氨基]-1-丙磺酸内盐)的洗脱顺序,溶菌酶能够得到高效分离。保持蛋清的原p H 8.8,25 mmol/L KH2PO4,150 mmol/L Na Cl,尿素CHAPS洗脱,是CPLL提供高效富集的前提。通过分析CPLL富集前后的十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDSPAGE)条带差异,采用线性离子阱(LTQ)质谱在蛋清中检出45种低丰度蛋白质,其中两种未见报道。对蛋清中低丰度蛋白质亚细胞的定位分析发现,蛋清蛋白质的分泌蛋白居多。研究结果表明,CPLL技术能够实现蛋清中低丰度蛋白质的高效富集,分析深度达到亚细胞水平。