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LiDS-PAGE gel (polyacrylamide gradient, 10 to 20%) of PBSs from Synechococcus sp. strain WH8102 cells acclimated at four irradiances (in micromoles of photons per square meter per second) and WH7803 cells grown at 15 μmol of photons · m−2 · s−1. (Right) Coomassie staining. (Left) Same gel under UV light in the presence of 20 mM zinc acetate. The identity of star-labeled polypeptides was determined by N-terminal sequencing (in addition to mass spectrometry).
