“Abstract Both photosystems, PS 370 and PS 565, controlling behavioral responses in Halobacterium halobium [E. Hildebrand and N. Dencher, Nature 257, 46 - 48 (1975)] are reversibly inhibited when bacteria are grown in the presence of 1 mM nicotine which is known to block biosynthesis of retinal.”
“ PS 370 becomes fully sensitive if reconstituted in the presence of nicotine.”