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Bacteriorhodopsin as a possible chloride pump
Author(s) -
Dér András,
Tóth-Boconádi Rudolf,
Keszthelyi Lajos
Publication year - 1989
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(89)81485-1
Subject(s) - bacteriorhodopsin , chloride , ion pump , chemistry , current (fluid) , halorhodopsin , ion , flash (photography) , membrane , transient (computer programming) , inorganic chemistry , analytical chemistry (journal) , chromatography , optics , thermodynamics , biochemistry , organic chemistry , physics , computer science , operating system
Purple membranes oriented and immobilized in gel show charge transfer at pH 0.55 if the pH is set by HCl. Current appears as laser flash driven transient and also as continuous current by quasi‐continuous illumination. If the pH value 0.55 is set by H 2 SO 4 continuous current is not observed. The results suggest that bacteriorhodopsin may pump chloride ions at low pH.