Abstract
The conformers of peridinin-chlorophyll a proteins (PCP), isolated from various strains of the symbiotic dinoflagellate Symbiodinium (= Gymnodinium) microadriaticum and analyzed by isoelectric focusing in polyacrylamide gels, exhibited different patterns. In most instances the same pattern of conformers was found in each strain when freshly isolated from their respective hosts, after culture, and in 2 instances also after cloning. Evidently, characteristic patterns of PCP are diagnostic of particular strains of S. microadriaticum. Generally, the patterns do not change with environment. Analysis of PCP could potentially serve as a tool for the identification of strains of S. microadriaticum and could serve as a marker for the empirical analysis of sexual recombination.

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