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Kinetic characteristics of microsomal NAD-glycohydrolase natural and solubilized with a non-ionic surface-active substance

Sestini, S.; Cinci, G.; Ricci, C.

Bollettino della Societa Italiana di Biologia Sperimentale 58(8): 450-452

1982

ISSN/ISBN: 0037-8771
PMID: 6284185
Document Number: 194160
Microsomal rat spleen NAD-glycohydrolase was solubilized by Nonidet P40. The solubilized enzyme shows Nicotinamide inhibition and pH dependence at the same extent as unsolubilized microsomal one. It differs from the latter in having a higher affinity for NAD and NADP, and in showing two peaks, instead of one, on electrofocusing: the former with a pH 5 pI without any activity, the latter with a pH 4, 1 pI with a high NAD-ase activity.

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