A salt or ester of pantothenic acid. ... Pantothenate synthetase, an enzyme that converts pantoate and beta-alanine to pantothenate with cleavage of ATP to AMP and PPi; a key step in coenzyme A biosynthesis. ... Synonym: pantoate-activating enzyme. ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973