OEP80, an essential protein paralogous to the chloroplast protein translocation channel Toc75, exists as a 70-kD protein in the Arabidopsis thaliana chloroplast outer envelope.

Abstract excerpt

Toc75 and OEP80 are paralogous proteins found in the Viridiplantae lineages, and appear to have evolved from a protein in the outer membrane of an ancient cyanobacterium. Toc75 is known to act as a protein translocation channel at the outer membrane of the chloroplast envelope, whereas the exact function of OEP80 is not understood. In Arabidopsis thaliana, each protein is encoded by a single gene, and both are...

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