Biol Cell 1989 Jan 01;672:167-71.

Translation in a cell-free system, and in Xenopus oocytes, of mRNA which specify a cadmium-binding protein in Nereis diversicolor (Annelida, Polychaeta).

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The presence in the marine worm Nereis diversicolor of a low molecular mass protein with the capacity to bind cadmium has been previously demonstrated. Poly(A)(+)-mRNA were extracted from coelomocytes of Nereis diversicolor and were translated either in vitro, using a rabbit reticulocyte lysate, or in vivo into Xenopus laevis oocytes. Analysis of synthesized polypeptides by enzyme-linked immunosorbent assay (ELISA) and by Western blotting, using a specific monoclonal anti-MP II antibody, showed that this metalloprotein was translated both in in vitro and in vivo translation systems, with an apparent molecular mass of 11-13 kDa. Two other products, with 26.5 and 28 kDa molecular mass, cross-reacted with the monoclonal anti-MP II antibodies. The present work confirms that coelomocytes are sites of important synthesis of MP II-mRNA.

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