Castillo, Lourdes V. and Maita, Yoshiaki (1991) Isolation and Partial Characterization of Cadmium Binding Proteins from the Oceanic Squid, Ommastrephes bartrami. Bulletin of the Faculty of Fisheries - Hokkaido University, 42 (1). pp. 26-34.

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Abstract

Cadmium binding proteins were isolated from the liver of the squid, Ommastrephes bartrami, collected from the North Pacific Ocean. Based on the elusion position on Sephadex G-75, its apparent molecular weight is about 16,000. By ion exchange chromatography, the cadmium-protein complexes were separated further into a cadmium binding protein and two cadmium, copper binding proteins. Each metal binding protein contains about 21-29% dicarboxylic acid (Aspartic and Glutamic acids), traces of histidine and phenylalanine, and a proportionally higher glycine content than horse metallothionein. Based on the amino acid composition, it seems that the cadmium binding proteins from the squid are different from the mammalian metallothionein

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