1QBI:
reference: The 1.7 A crystal structure of the apo form of the soluble quinoprotein glucose dehydrogenase from Acinetobacter calcoaceticus reveals a novel internal conserved sequence repeat., Oubrie A, Rozeboom HJ, Kalk KH, Duine JA, Dijkstra BW, J Mol Biol 1999 Jun 4;289(2):319-33. PMID: 10366508

This OCA Structure page
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