Trace elements in enzyme systems with special reference to deficiencies of copper and cobalt in some animal diseases

Abstract

Certain elements, usually present in plants and animals in only trace amounts, are essential for normal growth and functioning. Absence of these trace elements, or their provision in inadequate amounts, can lead to severe economic losses in crops and farm animals. The essentiality of these elements, coupled with the minute amounts required, suggests a catalytic or enzymic role. This rôle is discussed in some detail with particular reference to copper and cobalt in sheep and cattle.