Tags: Protein.
Phycocyanin is a pigment-protein complex from the light-harvesting phycobiliprotein family along with allophycocyanin and phycoerythrin. It is an accessory pigment to chlorophyll. All phycobiliproteins are water-soluble so they cannot exist within the membrane like carotenoids can. Instead phycobiliproteins aggregate to form clusters that adhere to the membrane called phycobilisomes.
