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利用毛细管电泳(capillaryelectrophoresis,CE)分离猪脑、鼠脑组织中主要几种神经节苷脂GM_1、GD_(1a)、GD_(1b)、GT_(1b),在缓冲液中加入α-环状糊精(α-cyclodextrin,α-CD)来提高分离的选择性和效率,并对缓冲液的pH值、α-CD浓度和电压等变化因素进行研究。结果表明在含15.0mmol/Lα-环状糊精的2.5mmol/L磷酸级冲液(pH8.6)中,电压为25kV时能很好的分离生物样品。从猪脑提取物中分离出GM_3、GM_1、GD_(1a)、GD_(1b)、GT_(1b)和含唾液酸的其他糖脂类物质,鼠脑中分离出GM_1、GD_(1a)和GT_(1b),说明毛细管电泳可用于分离神经节苷脂,具有快速、简便、节约等特点。
The main gangliosides GM_1, GD_ (1a), GD_ (1b) and GT_ (1b) in pig brain and brain were isolated by capillary electrophoresis (CE) Α-cyclodextrin (α-CD) was used to improve the selectivity and efficiency of separation. The factors of pH value, α-CD concentration and voltage were studied. The results showed that in a 2.5 mmol / L phosphoric acid solution (pH 8.6) containing 15.0 mmol / L α-cyclodextrin, the biological sample can be well separated at a voltage of 25 kV. GM_1, GD_ (1a), GT_ (1a), GD_ (1b), GT_ (1b) and other sialic acid containing glycolipids were isolated from porcine brain extracts. (1b), indicating that capillary electrophoresis can be used to separate gangliosides, with fast, simple, economical and so on.