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. 1998 May 26;95(11):5935–5941. doi: 10.1073/pnas.95.11.5935

Figure 3.

Figure 3

The octameric LH-II complex from Rs. molischianum (19). (a) The α-helical segments are represented as cylinders with the α-apoproteins (inside) in blue and the β-apoprotein (outside) in magenta. The BChl molecules are in green with phytyl tails truncated for clarity. The lycopenes are in yellow. (b) Arrangement of chromophores with BChls represented as squares, and with carotenoids (lycopenes) in a licorice representation. Bars connected with the BChls represent the Qy transition dipole moments as defined by the vector connecting the N atom of pyrrol I and the N atom of pyrrol III (22). Representative distances between central Mg atoms of B800 BChl and B850 BChl are given in Å. The B850 BChls bound to the α-apoprotein and the β-apoprotein are denoted as B850a and B850b, respectively; BChl B850a′ is bound to the (left) neighboring heterodimer.