phytochromobilin biosynthetic process

The chemical reactions and pathways resulting in the formation of phytochromobilin, which involves the oxidative cleavage of heme by a heme oxygenase(HO) to form biliverdin IX alpha.

phycocyanobilin biosynthetic process

The chemical reactions or pathway resulting in the formation of phycocyanobilin, which involves the oxidative cleavage of heme by a heme oxygenase (HO) to form biliverdin IX alpha. Biliverdin IX alpha is subsequently converted to phycocyanobilin by a ferredoxin-dependent oxidoreductase (PCYA).