The ultraviolet transient absorption assigned to the tyrosinate species in bacteriorhodopsin is followed in time and as a function of pH. Both its rise time and titration curve closely resemble those observed for the production of the M 412 intermediate. These results may support a recently proposed mechanism that couples tyrosinate production to the Schiff base deprotonation in the proton pump of bacteriorhodopsin.
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Fukumoto et al. (1984) studied this question.
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