95 kDa Lcm (phycobilisome - to- thylakoid core linker with phycocyanobilin chromophore)

native protein purified from phycobilisomes of Porphyridium cruentum

95 kDa (Porphyridium cruentum), 75-120 kDa (other species)

Anabaena sp. sample can serve as a negative control, as under nitrogen deficient conditions phycobiliproteins are going to be lost.
Overall sample quality is of crucial importance and in older or not properly stored samples, phycobiliproteins will undergo proteolytic degradation.

A large polypeptide Lcm with a few phycocyanobilin chromophores which acts as a terminal energy acceptor and as a linker polypeptide between the phycobilisomes and the photosynthetic reaction centres (PS2).