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allophycocyanin, beta subunit The alpha and beta subunits of allophycocyanin form heterodimers, six of which associate into larger aggregates as part of the phycobilisome, a light-harvesting complex of phycobiliproteins and linker proteins. This model describes allophycocyanin beta subunit. Other, homologous phyobiliproteins include allophycocyanin alpha chain and the phycocyanin and phycoerythrin alpha and beta chains. [Energy metabolism, Photosynthesis]
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