A mutant of Arabidopsis deficient in chloroplast dicarboxylate transport is missing an envelope protein

Abstract

The polypeptide composition of chloroplast envelopes from wild-type Arabidopsis was compared with that of a mutant (CS1562) deficient in chloroplast dicarboxylate transport activity. An abundant 42 kilodalton (kd) protein in the envelopes from wild-type is low or absent in envelopes from the mutant. It is suggested that this polypeptide may be a component of the dicarboxylate transporter.