Fig. 3

Profile of phycobiliprotein in the cryoconite samples. a Normalized abundance of the genes encoding alpha subunit of allophycocyanin (apcA), phycocyanin (cpcA), and phycoerythrin (cpeA). b Low-temperature fluorescence emission of the dissociated phycobiliproteins of the cryoconite samples and monoculture of Phormidesmis priestleyi at 540 nm excitation that preferentially excites phycoerythrin. c Composition of cyanobacterial lineages that possess phycocyanin only (PC) or both phycocyanin and phycoerythrin (PC + PE) based on the reconstructed MAGs and their relative read abundance (see Table S7 and Fig. S7). Because presence/absence of PE in the Group 7 MAGs was not identified in this study, the composition of Group 7 lineages was indicated separately