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首页> 外文期刊>Crystal growth & design >Temperature and pH Effect on the Polymorphism of Aprotinin(BPTI)in Sodium Bromide Solutions
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Temperature and pH Effect on the Polymorphism of Aprotinin(BPTI)in Sodium Bromide Solutions

机译:温度和pH对溴化钠溶液中抑肽酶(BPTI)多态性的影响

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In this contribution,we present the phase transition of protein crystals in suspension as a function of temperature and pH.We measure the solubility of two polymorphs of aprotinin(BPTI)in 2 M NaBr solutions at different acidic pH values between 4.50 and 5.13 at 20 deg C.We observe a major increase in solubility when the pH is increased from 4.5 to 5.13.The temperature effect between 5 and 35 deg C on the solubility of the two BPTI polymorphs in 2 M NaBr solutions is investigated at pH 4.5 and 4.75.We observe two polymorphs in the same solution with direct and reverse solubility curves.We show that an adequate control of temperature around the transition temperature between the two polymorphs can be used to obtain the polymorph desired.
机译:在这项贡献中,我们提出了悬浮液中蛋白质晶体的相变随温度和pH的变化。我们测量了抑肽酶(BPTI)的两种多晶型物在2 M NaBr溶液中在20至4.50和5.13之间的不同酸性pH值下的溶解度pH值从4.5增加到5.13时,我们观察到溶解度显着增加。在pH值为4.5和4.75的情况下,研究了温度在5到35摄氏度之间对两种BPTI多晶型物在2 M NaBr溶液中的溶解度的影响。我们在同一溶液中观察到两个多晶型物具有正向和反向的溶解度曲线,表明可以在两个多晶型物之间的转变温度附近适当控制温度,从而获得所需的多晶型物。

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