大肠杆菌中磷酸盐、钾离子和质子的联合转运
Linked transport of phosphate, potassium ions and protons in Escherichia coli.
作者信息
Russell L M, Rosenberg H
出版信息
Biochem J. 1979 Oct 15;184(1):13-21. doi: 10.1042/bj1840013.
Abstract
Pi entry into Escherichia coli cells through either of the two Pi-transport systems (Pit or Pst) prompts the influx of K+ and H+ in a ratio that depends on the external pH. The entry of Pi is absolutely dependent on the presence of K+, and the entry of K+ is equally dependent on the presence of Pi. Experiments with a number of mutants carrying any one functional Pi-transport system and one or more of the individual K+-transport systems indicate a permissive type of linkage of the two transports, in that there is no obvious preference by any of the Pi-transport systems for a particular K+-transport system for the concomitant entry of the two ions.
摘要
磷酸根离子（Pi）通过两种Pi转运系统（Pit或Pst）中的任何一种进入大肠杆菌细胞，会促使钾离子（K+）和氢离子（H+）以取决于外部pH值的比例流入。Pi的进入绝对依赖于K+的存在，而K+的进入同样依赖于Pi的存在。对许多携带任何一种功能性Pi转运系统以及一个或多个单个K+转运系统的突变体进行的实验表明，这两种转运之间存在一种允许性的联系类型，即任何一种Pi转运系统对于特定的K+转运系统在两种离子伴随进入时都没有明显的偏好。
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