Phycobilisome rod-core linker polypeptide CpcG2 tlr1964 MTIPLLSYAPSSQNQRVAGYEVPNEETPWRYSLEDAVDQSDIDELIWAAYRQVFSEHVVLKSTRQPHLESQLANRAISVRDFIRGLAKSETFRRLVVETNSNYRLVEIALKRLLGRAPYNKQEELAWSIRIATDGWQKFVDTLVDSDEYTQNFGDNTVPYQRRRYKDRPFNLVTPRYSDYWRDKLENSRYKWGDIRNFLEMARSVKVTPVQFKPVSTANVQIPDTTRRDRPTVPASINPTASFPLR 246 Linker polypeptides determine the state of aggregation and the location of the disk-shaped phycobiliprotein units within the phycobilisome and modulate their spectroscopic properties in order to mediate a directed and optimal energy transfer (By similarity). cpcG2 PYG2_THEEB Rod-core linker protein required for attachment of phycocyanin to allophycocyanin in cores of phycobilisomes (By similarity).