Biosynthesis of deuterated isoperoxidases in rye plants grown in D2O.

Abstract
Winter rye seeds, which germinated well in 99.77% D2O, contained an assembly of 6 isoperoxi-dases similar to those found in control seeds germinated in H2O. By electrophoresis in H2O- or D2O-starch gel, 5 of these isoperoxtdases obtained from the D2O series were shown to be deuterated. De novo biosynthesis probably occurred.