目的针对重组Ⅲ型人源化胶原蛋白的关键质量参数进行检测方法研究。方法采用基质辅助激光解吸/飞行时间质谱(matrix-assisted laser desorption ionization time of flight mass spectrometry,MALDI-TOF MS)及尺寸排阻色谱与多角度光散...目的针对重组Ⅲ型人源化胶原蛋白的关键质量参数进行检测方法研究。方法采用基质辅助激光解吸/飞行时间质谱(matrix-assisted laser desorption ionization time of flight mass spectrometry,MALDI-TOF MS)及尺寸排阻色谱与多角度光散射联用(size exclusion chromatography with multi-angle light scattering,SEC-MALS)法测定相对分子质量及其分布;采用毛细管凝胶电泳(capillary electrophoresis sodium dodecyl sulfate,CE-SDS)和分子排阻高效液相色谱(size exclusion high performance liquid chromatography,SE-HPLC)分析纯度;采用离子交换法和毛细管区带电泳(capillary zone electrophoresis,CZE)分离分析电荷异构体;采用“双”酶切肽图法进行一级结构鉴别试验和序列覆盖率分析。结果MALDI-TOF MS测得相对分子质量45.01×10^(3);SEC-MALS得到其单体相对分子质量为45.17×10^(3)(±0.226%);两种相对分子质量测定方法结果一致。CE-SDS(非还原)纯度为98.77%,其他成分1.23%;SE-HPLC纯度为98.07%,其他成分1.93%;两种纯度测定方法结果一致。强阳离子交换共鉴定到14种电荷异构体组分,其中酸性峰占比52.08%,主峰占比26.22%,碱性峰占比21.70%;CZE鉴定到8种电荷异构体组分,其中酸性峰占比52.10%,主峰占比25.27%,碱性峰占比22.63%;两种电荷异构体鉴别方法,酸性组分、主峰与碱性组分,分布规律一致。“双”酶切肽图法实现重组Ⅲ型人源化胶原蛋白的序列100%覆盖,实测序列与预期序列一致。结论建立了重组Ⅲ型人源化胶原蛋白关键质量参数分析方法,该方法具有保证产品安全、有效、质量可控的特点,为我国重组Ⅲ型人源化胶原蛋白的质量控制提供了参考依据。展开更多
Arsenic is one of the most common inorganic contaminants in groundwater worldwide,mainly due to the release of naturally occurring arsenic from aquifer sediments（Amini et al.,2008;Li and Cai,2015;Rahman et al.,2015）...Arsenic is one of the most common inorganic contaminants in groundwater worldwide,mainly due to the release of naturally occurring arsenic from aquifer sediments（Amini et al.,2008;Li and Cai,2015;Rahman et al.,2015）.Naturally occurring arsenic exists predominantly in arsenate and arsenite species in groundwater.展开更多
文摘目的针对重组Ⅲ型人源化胶原蛋白的关键质量参数进行检测方法研究。方法采用基质辅助激光解吸/飞行时间质谱(matrix-assisted laser desorption ionization time of flight mass spectrometry,MALDI-TOF MS)及尺寸排阻色谱与多角度光散射联用(size exclusion chromatography with multi-angle light scattering,SEC-MALS)法测定相对分子质量及其分布;采用毛细管凝胶电泳(capillary electrophoresis sodium dodecyl sulfate,CE-SDS)和分子排阻高效液相色谱(size exclusion high performance liquid chromatography,SE-HPLC)分析纯度;采用离子交换法和毛细管区带电泳(capillary zone electrophoresis,CZE)分离分析电荷异构体;采用“双”酶切肽图法进行一级结构鉴别试验和序列覆盖率分析。结果MALDI-TOF MS测得相对分子质量45.01×10^(3);SEC-MALS得到其单体相对分子质量为45.17×10^(3)(±0.226%);两种相对分子质量测定方法结果一致。CE-SDS(非还原)纯度为98.77%,其他成分1.23%;SE-HPLC纯度为98.07%,其他成分1.93%;两种纯度测定方法结果一致。强阳离子交换共鉴定到14种电荷异构体组分,其中酸性峰占比52.08%,主峰占比26.22%,碱性峰占比21.70%;CZE鉴定到8种电荷异构体组分,其中酸性峰占比52.10%,主峰占比25.27%,碱性峰占比22.63%;两种电荷异构体鉴别方法,酸性组分、主峰与碱性组分,分布规律一致。“双”酶切肽图法实现重组Ⅲ型人源化胶原蛋白的序列100%覆盖,实测序列与预期序列一致。结论建立了重组Ⅲ型人源化胶原蛋白关键质量参数分析方法,该方法具有保证产品安全、有效、质量可控的特点,为我国重组Ⅲ型人源化胶原蛋白的质量控制提供了参考依据。
文摘Arsenic is one of the most common inorganic contaminants in groundwater worldwide,mainly due to the release of naturally occurring arsenic from aquifer sediments（Amini et al.,2008;Li and Cai,2015;Rahman et al.,2015）.Naturally occurring arsenic exists predominantly in arsenate and arsenite species in groundwater.
