Abstract
Assay conditions, intracellular distribution and change of activity during greening of etiolated seedlings of Vicia faba L. have been investigated for aldose reductase (EC 1.1.1.21), UDP-glucose pyrophosphorylase (EC 2.7.7.9), UDP-glucose 4-epimerase (EC 5.1.3.2) and phosphatidate phosphatase (EC 3.1.3.4). The first three enzymes were found to be soluble proteins of the cytoplasm, whereas phosphatidate phosphatase was found in the soluble and a sedimentable (15000 Xg) fraction.