Plaxton, W.C. and Storey, K.B. 1983. Purification and properties of alanopine dehydrogenase isozymes from the channeled whelk, Busycotypus canaliculatum. Comp. Biochem. Physiol. 76B, 321-326.

PURIFICATION AND PROPERTIES OF ALANOPINE DEHYDROGENASE ISOZYMES FROM THE CHANNELED WHELK, BUSYCOTYPUS CANALICULATUM

WILLIAM C. PLAXTON and KENNETH B. STOREY


Abstract
1. Three tissue specific isozymes of alanopine dehydrogenase (ADH: alanopine: NAD oxidoreductase) were purified to homogeneity from foot muscle. gill and hepatopancreas of the channeled whelk, Busycotypus canaliculatum.

2. Muscle ADH showed properties, in particular the effect of decreasing pH in lowering apparent Kmís for pyruvate and L-alanine, which appear to gear this isozyme for alanopine synthesis as an end product of anaerobic glycolysis.

3. The hepatopancreas isozyme, with a high affinity for meso-alanopine and NAD, appears suited for a role in alanopine oxidation in vivo.

4. The properties of gill ADH are intermediate between those of the other two forms.