摘要
目的建立快速毛细管SDS无胶筛分电泳法(SDS—NGS),测定小分子多肽相对分子质量。方法涂层毛细管(管长30cm,内径100μm);分离电压为9kV(300V/cm),分离温度为20℃;检测波长为214nm,检测时间为18min;所用SDS-多肽相对分子质量标准范围为2512—16949;以橙G(06)为内标参照物。结果在相对分子质量2512—16949范围内,多肽相对分子质量的对数与其相对迁移率具有良好的线性关系(r=0.996);应用该方法测定了重组人奈西立肽、重组人表皮生长因子、虎纹镇痛肽、重组人心钠肽4种重组小分子多肽的相对分子质量,所测结果变异系数CV均小于3%。结论毛细管SDS无胶筛分电泳方便快速,灵敏度高,重现性好,结果准确,可作为小分子多肽相对分子质量的检测方法。
Objective To develop a capillary SDS non-gel sieve electrophoresis for rapid determination of relative molecular mass of small polypeptide. Methods Determine the relative molecular mass of small polypeptide by capillary SDS non-gel sieve electrophoresis using orange G(OG) as internal reference under the following condition:coated capillary( length 30 cm, internal diameter 100 μm) ;separation voltage 9 kV (300 V/cm) ;separation temperature 20℃ ;detection wavelength 214 nm;detection time 18 rain; SDS-polypeptide marker(Mr 2 512-16 949). Results The relative molecular mass at a range of 2 512-16 949 showed a good linear relationship to the migration rate of polypeptide( r = 0. 996). The relative molecular masses of 4 kinds of small pelypeptides, i. e. recombinant human B type natriuretic peptide (rhBNP), recombinant human epidermal growth factor (rhEGF), Huwen analgesic pepfide (HWAP-1) and recombinant human atrial natriuretic peptide( rhANP), showed a variation coefficient of less than 3%. Conclusion Capillary SDS non-gel sieve electropberesis was simple ,rapid,accurate and of good repeatability. It might be used for the determination of relative molecular mass of small polypeptide.
出处
《中国生物制品学杂志》
CAS
CSCD
2007年第2期122-124,共3页
Chinese Journal of Biologicals
基金
国家"863"高技术发展计划项目(课题编号2003AA2Z3481)
关键词
毛细管SDS无胶筛分电泳
小分子多肽
相对分子质量
Capillary SDS non-gel sieve electropberesis
Small polypeptide
Relative molecular mass