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J Bacteriol. 1989 April; 171(4): 2155-2159

research-article

Biosynthesis of the two halobacterial light sensors P480 and sensory rhodopsin and variation in gain of their signal transduction chains.

J Otomo, W Marwan, D Oesterhelt, H Desel and R Uhl

Max-Planck-Institut für Biochem e, Martinsried, Federal Republic of Germany.

ABSTRACT

The two retinal-containing photoreceptors of halobacteria, P480 and sensory rhodopsin, are formed constitutively and inducibly, respectively. Both photoreceptors are synthesized as apoproteins in cells with nicotine-inhibited retinal synthesis and are reconstituted as chromoproteins by the addition of all-trans retinal to cell membrane preparations. The decrease in photoreceptor-mediated photophobic response at the stationary growth phase of cells is not due to photoreceptor degradation but due to a deficiency of the signal transduction chain in the cell.

J Bacteriol. 1989 April; 171(4): 2155-2159






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