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Protein Science, Vol 3, Issue 12 2447-2449, Copyright © 1994 by Cold Spring Harbor Laboratory Press
FOR THE RECORD |
H. LOOS, U. ERMLER, G. A. SPRENGER and H. SAHM
Institut fur Biotechnologie 1, Forschungszentrum Julich GmbH, P.O. Box 1913, D-52425 Julich, Germany
Glucose-fructose oxidoreductase (E.C. 1.1.99.-) from the ethanol-producing Gram-negative bacterium Zymomonas mobilis is a periplasmic, soluble enzyme that forms a homotetramer of 160 kDa with one NADP(H) cofactor per subunit that is tightly, but noncovalently, bound. The enzyme was crystallized by the hanging drop vapor diffusion method using sodium citrate as precipitant. The obtained crystals belong to the space group P2(1)2(1)2, with unit cell constants of 84.6 A, 94.1 A and 117.0 A, consistent with two monomers in the asymmetric unit. They diffract to a resolution of about 2 A and are suitable for X-ray structure determination.
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