Direct differentiation of A-ring single attachment versus A- and D-ring double attachment of phycoerythrobilin chromophores to phycobiliproteins using MALDI mass spectrometry.


Bilin chromophore attachment to phycobiliproteins is an enzyme-catalyzed post-translational modification process. Bilin-lyases attach a bilin chromophore to their cognate protein through a thioether bond between the chromophore and a cysteine moiety. Bilin chromophores are attached to their phycobiliproteins through the 3(1) carbon of the bilin. Double… (More)
DOI: 10.1002/jms.3146


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