3.1.3.21 glycerol 1-phosphate + H2O = glycerol + phosphate the Dunaliella enzyme acts more rapidly on sn-glycerol-1-phosphate than on the 3-phosphate - 3.1.3.21 glycerol 1-phosphate + H2O = glycerol + phosphate the enzyme in yeast also acts on propane-1,2-diol-1-phosphate, but not on a variety of other phosphate esters -