the suggestion , that the increase in the far-uv cd signal of the 124 kda oat phytochrome upon phototransformation of the pr to pfr form is possibly due to the chromophore interaction with the n-terminus segment of the phytochrome protein in the pfr from ( chai , y.g. , song , p.s. , cordonnier , m.-m. and pratt , l.h . ( 1987 ) biochemistry 26 , 4947-4952 ) , has been investigated by measuring the circular dichroism in the absence of exogenous tetrapyrrolic chromophores ( bilirubin , biliverdin , chlorophyllin and hemin ) .
C0005437
bilirubin
C0005446
biliverdin