Wheat metallothioneins

Lane, B., Kajioka, R. Kennedy, T. (1987). The wheat-germ Ec protein is a zinc-containing metallothionein. Biochemistry and Cell Biology 65, 1001-5. 

Metallothioneins of class II also contain a high proportion of cysteine units and their positions in various polypeptides of this group are quite diflferent. A molecule of these peptides contains the characteristic repeating units Cys-Cys and Cys-X-Cys or Cys-X-X-Cys, where X is an amino acid other than cysteine. These polypeptides were found in several economically important crops such as wheat, maize, rice, buckwheat and cotton, but often only in certain parts of the plant and at specific stages of its growth. 

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