A chromophore that is a linear tetrapyrrolic prosthetic group covalently attached to a large soluble protein phytochrome. Light absorption by the phytochrome chromophore triggers photoconversion between two spectrally distinct forms of the photoreceptor: Pr, the red light absorbing form, and Pfr, the far-red light absorbing form.
(2R,3Z)-phycocyanobilin
(CHEBI:15617)
is a
(2R)-phycocyanobilin
(CHEBI:47955)
(2R,3Z)-phycocyanobilin
(CHEBI:15617)
is conjugate acid of
(2R,3Z)-phycocyanobilin(2−)
(CHEBI:57437)
Incoming
(2R,3Z)-phycocyanobilin(2−)
(CHEBI:57437)
is conjugate base of
(2R,3Z)-phycocyanobilin
(CHEBI:15617)