title: Linked transport of phosphate, potassium ions and protons in Escherichia coli.
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.
mesh_terms: D001151:Arsenic / Q000494:pharmacology; D001692:Biological Transport / Q000187:drug effects; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009154:Mutation; D010710:Phosphates / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*; D011522:Protons; D012964:Sodium / Q000494:pharmacology
chemical_list: D010710:Phosphates; D011522:Protons; D012964:Sodium; D001151:Arsenic; D011188:Potassium