Rhodopinal

In 1958, a new intermediate in the bleaching sequence of rhodopsin was discovered, the liquid air illuminated rhodopin [93]. This red-shifted transient (Amax =543 nm) could be observed when cattle rhodopsin was irradiated in aqueous-glycerol... 

UO. Cyts h and c BChl a or b Intracyloplasmic membrane Spirilloxanthin, okenone, (/3-carotene), spheroidene, rhodopin, lycopene, neurosporene... 

Estimated by scaling the rhodopin glucoside Si-Bchl Qy electronic couplings in LH2 of Rps. acidophila calculated by the TDC method [83]. 

Figure 9. A comparison of transition densities for rhodopin glucoside calculated using TDDFT (6-31++g basis set). On the right the So —> S2 transition is shown, with its large dipole transition moment being evidenced by the change in sign of this TD from one end of the molecule to the other. On the left the So — Si transition is shown. The symmetry of the TD causes the transition to be optically forbidden. See color insert.

Inhibitor studies with the photosynthetic bacterium Rhodomicrobium vannielii showed that both nicotine and CPTA [2-(4-chlorophenylthio)triethylammonium chloride] block the formation of both /3-carotene and the major acyclic carotenoids such as rhodopin [l,2-dihydro- /r,i/f-caroten-l-ol (184)] and spirillo-xanthin [l,T-dimethoxy-3,4,3, 4 -tetradehydro-1,2,1, 2 -tetrahydro-i/, t/r-caro-... 

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