Properties of metallothionein induced by zinc, copper and cadmium in the frog, xenopus laevis

  • Suzuki K
  • Tanaka Y
  • Kawamura R
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Abstract

1. Repeated injections of zinc (Zn) and copper (Cu) into the frog Xenopus laevis caused accumulations of the respective metals in the liver and kidney. 2. The accumulated metals in the liver supernatant fractions were present as Zn- and Cu-binding proteins of the same properties as that of metallothionein (MT) induced by cadmium (Cd) injections. 3. The affinity ofZn, Cu and Cd ions to the metal-binding protein was in the decreasing order of Cu, Cd and Zn. 4. The Xenopus MT induced by Cd was unstable and disrupted easily to give two peaks as if the MT consists of two isometallothioneins. ?? 1983.

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Authors

  • Kazuo T. Suzuki

  • Yasunobu Tanaka

  • Ryoko Kawamura

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