Characterization of green mutants in Fremyella diplosiphon provides insight into the impact of phycoerythrin deficiency and linker function on complementary chromatic adaptation

► Phycobiliprotein linker CpeE is required for PE accumulation in green light. ► CpeE impacts photosynthetic pigment levels as a mutant has low chlorophyll levels. ► A novel protein is required for PE accumulation in green light.