PMC:103662 / 21372-22084 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/103662","sourcedb":"PMC","sourceid":"103662","source_url":"https://www.ncbi.nlm.nih.gov/pmc/103662","text":"Under the same conditions where M is observed (pH 9.5 and in 1% DHPC), pR undergoes fast proton release during its photocycle (Fig. 5). The pH indicator dye Cresol Red was used to detect pH changes in the bulk aqueous phase. These turn out to be similar to those observed for bR in the pH range 5.5–10. After photoexcitation, pR (like bR, presumably) ejects a H+ from a residue near its extracellular surface decreasing the pH of the solution. When the N → O transition takes place in bR, H+ is taken up from the medium, raising the pH once again. The H+ signals from pR measured with Cresol Red occur on a time scale similar to that assignable to M and N decay, returning to baseline about 1 s after photolysis.","tracks":[]}