1) Pigment 
Phycobilins (from Greek: φύκος (phykos) meaning `alga`, and from Latin: bilis meaning `bile`) are light-capturing bilanes found in cyanobacteria and in the chloroplasts of red algae, glaucophytes and some cryptomonads (though not in green algae and plants). Most of their molecules consist of a chromophore which makes them colored. They ar...
(from the article `blue-green algae`) Cyanobacteria contain only one form of chlorophyll, chlorophyll a, a green pigment. In addition, they contain various yellowish carotenoids, the blue ...
[n] - water-soluble proteinaceous pigments found in red algae and cyanobacteria
noun water-soluble proteinaceous pigments found in red algae and cyanobacteria