Eubacterial origin of nuclear genes for chloroplast and cytosolic glucose-6-phosphate isomerase from spinach: sampling eubacterial gene diversity in eukaryotic chromosomes through symbiosis.

Abstract excerpt

Higher plants possess two distinct nuclear-encoded glucose-6-phosphate isomerase (GPI) isoenzymes, a cytosolic enzmye of the Embden-Meyerhof pathway and a chloroplast enzyme essential to storage and mobilization of carbohydrate fixed by the Calvin cycle. We have purified spinach chloroplast GPI to homogeneity, determined amino acid sequences from the active enzyme, and cloned cDNAs for chloroplast and cytosolic...

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