It is a trace element which is available in most of the fruits.
Maximum in heart, brain, kidney & crustaceans.
By its deficiency monkin's disease is caused.
Copper is required --
(a) For synthesis of haemoglobin.
(b) It is a component of cytochrome oxidase (cytochrome a3) and ribulose biphosphate carboxylase, plastocyanin, ascorbic acid oxidase, etc.
(c) It is connected with the formation of chlorophyll and maintenance of carbohydrate nitrogen balance.