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Reaction of gloeobacter rhodopsin, with β-carotene added, with 0.2 M of hydroxylamine, pH 7.2 in the dark. A. Absorption spectra; 1, immediately after addition of hydroxylamine; 2 through 7, measured 10, 30, 60, 90, 150 and 240 min after addition; B. 1, through 6, absorption changes “spectrum i minus spectrum 1” where i are spectra 2 through 7 in panel A.
