48 巻 (1982) 7 号 p. 975-979
The pigment of the brick-red colored oysters collected in the Kesennuma Bay was identified as peridinin. Peridinin existed in the form of water soluble peridinin-chlorophyll a-protein complex (PCP) in the digestive diverticulum. The properties of this PCP were as follows: λmax: 410, 480, 670nm; chromogen (peridinin: chl. a=4:1 molar ratio); coagulation temperature 40-60°C; ammonium sulfate precipitation 60-80% saturation. Polyacrylamide disc gel electrophoresis showed a single broad brick-red band. Sephadex G-100 gel filtration gave two components: F II. The properties of PCPs suggest that the PCPs in oysters are derved from the PCP of the red tide dinoflagellate Prorocentrum micans.