the wavelengths of the alpha-absorption-band maxima of the b-type cytochromes at 77k were : ( a ) for aerobically grown cells , cytochrome b ( e ( m7 ) +260mv ) , 556nm and 563nm , cytochrome b ( e ( m7 ) +80mv ) , 556nm and cytochrome b ( e ( m7 ) -50mv ) , 558nm ;
C1256751
b-type cytochromes
C0010744
cytochrome b