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Apparent molecular mass of wild-type CoGFP and of five CoGFP variants. Molecular mass determination of wild-type CoGFP by 10% SDS/PAGE (a), size-exclusion chromatography of the wild-type and variant-0 CoGFPs (b) and identification of monomeric and dimeric forms in wild-type and variants by 14% pseudo-native SDS/PAGE under 362 nm excitation (c).
