Metal chelate affinity chromatography of hamster interferon

Abstract
Summary Syrian hamster interferon, produced by benzo (a) pyrene-transformed embryo cells does not display an affinity for Zn++ chelate-agarose. However, the interferon binds to Cu++ chelate-agarose and can be displaced from the column by a falling pH-gradient. The chromatography of crude hamster interferon preparation on a tandem of columns: Zn++ chelate-agarose → Cu++ chelate-agarose results in a 25-fold purification of interferon.