アイナメ肝臓の放射性核種結合タンパク質〔英文〕

概要

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In order to gain further information on the biochemical behavior of radionuclides and radio-nuclide-binding proteins in a marine fish, the greenling Hexagrammos otakii was simultaneously marked with a mixed solution of 137Cs, 54Mn, 65Zn and 60Co by caudal peduncle injection. After determination of radioactivity dlstribution, the liver was homogenized. The percentage of radioactivity in the liver to the total was 14 for 137Cs, 35 for 54Mn, 22 for 65Zn and 10% for 60Co, respectively. In the liver, 86% of 137Cs was distributed in the super-natant (soluble protein) fraction, whereas only 31% of 54Mn was distributed in the supernatant. Gel chromatography and electrophoresis showed that radionuclides were bound to several proteins with different molecular weights. Their amino acid compositions widely differed from each other. The present results suggested that there was a biochemical rule(s) by which each radionuclide bound to those proteins.
日本水産學會の論文