...
首页> 外文期刊>Crystal growth & design >Dependence of apoferritin crystal growth on temperature and cadmium concentration
【24h】

Dependence of apoferritin crystal growth on temperature and cadmium concentration

机译:载铁蛋白晶体生长对温度和镉浓度的依赖性

获取原文
获取原文并翻译 | 示例
           

摘要

Static light scattering and multiwell microbatch crystallization experiments have been used to determine how apoferritin crystal growth kinetics and final crystal size depend on temperature, pH, and cadmium concentration. The experiments were conducted on a linear thermal gradient covering a range from 30 to 40 degrees C. Crystal growth was monitored in situ under a microscope without disturbing the thermal environment. A dependence of apoferritin crystal formation and growth on temperature and cadmium concentration was observed. The range of cadmium concentrations that resulted in apoferritin crystal growth was evaluated and found to be consistent with the osmotic second virial coefficients determined via static light scattering. For the domain of conditions where apoferritin crystal formation occurred, the initial molar growth rate of apoferritin crystals increased linearly with temperature. It was observed that increasing cadmium concentration decreased the dependence of the final crystal size on temperature. The measured dependence of growth kinetics on temperature allowed the estimation of an activation energy for crystal growth. By comparing the value of this activation energy with that for nucleation (obtained from the literature), it became possible to explain the observation of larger, but fewer, apoferritin crystals at higher temperatures, which has also been reported in the literature for other proteins.
机译:静态光散射和多孔微批结晶实验已用于确定载铁蛋白晶体生长动力学和最终晶体尺寸如何取决于温度,pH和镉浓度。在覆盖30至40摄氏度的线性热梯度上进行实验。在显微镜下原位监测晶体生长,而不会干扰热环境。观察到载铁蛋白晶体的形成和生长对温度和镉浓度的依赖性。评估了导致脱铁铁蛋白晶体生长的镉浓度范围,发现该范围与通过静态光散射确定的渗透第二维里系数一致。在发生载铁蛋白晶体形成的条件范围内,载铁蛋白晶体的初始摩尔生长速率随温度线性增加。观察到增加的镉浓度降低了最终晶体尺寸对温度的依赖性。测得的生长动力学对温度的依赖性允许估算晶体生长的活化能。通过将该活化能的值与成核的活化能值进行比较(从文献中获得),就有可能解释在较高温度下观察到较大但较少的载铁蛋白晶体的现象,这在文献中也已有报道。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号