| APC | allophycocyanin |
| B-PE | B-phycoerythrin |
| C-PC | phycocyanin |
| C-PE | phycoerythrin |
| car | carotenoids |
| chl | chlorophyll |
| chl a | chlorophyll a |
| chl b | chlorophyll b |
| GAF | cGMP-specific phosphodiesterases/cyanobacterial adenylate cyclases/FhlA domain |
| GR | gloeorhodopsin |
| PAS | Per/ARNT/Sim domain |
| PHY | phytochrome-specific domain |
| PUB | phycourobilin |
| RC | reaction center |
| R-PE | R-phycoerythrin |
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