Abstract
Reaction centers from Rhodopseudomonas sphaeroides R 26 have been isolated from a crude extract obtained by lauryldimethylamine oxide extraction of chromatophore membranes, by HPLC using a combination of surface-mediated and size exclusion chromatography.
The eluted RCs exhibit a normal activity (t12 of the back-reaction is 70 ms) and are recovered in good yield (over 50 % based on the activity) and purity (based on the A 280 nm/A 800 nm = 1.30±0.05 ratio and the characteristic 3 polypeptides SDS-PAGE pattern). The elution time (5–10 mn) is about two orders of magnitude faster than for the classical purification techniques.