Structure of bacteriochlorophylls

bc	R1	R2	R3	R4	R5	R6	R7
a	C=O(CH3)	CH3	CH2-CH3	CH3	C=O(OCH3)	Geranylgeraniol ester	H
b	C=O(CH3)	CH3	=CH-CH3	CH3	C=O(OCH3)	Phytyl ester	H
c	C=O-CH3	CH3	C2H5 C3H7 C4H9	CH3	H	Farnesyl ester	CH3
cg	C-OH-CH3	CH3	C2H5 C3H7 C4H9	C2H5 CH3	H	Stearyl alcohol	CH3
d	C-OH-CH3	CH3	C2H5 C3H7 C4H9	C2H5 CH3	H	Farnesyl ester	H
e	C-OH-N	CH3	C2H5 C3H7 C4H9	C2H5 CH3	H	Farnesyl ester	CH3
g	C=CH2	CH3	C2H5	CH3	C=O-O-CH3	Farnesyl ester	H

: molecular diagrams chlorophyll proteins : R groups in table refer to image at left - click will change image to the structure of the reaction center of the purple bacterium Rhodopseudo-monas viridis, in which quinones and the cytochrome participate in electron transfer reactions with the bacteriochlorophylls.