has output phosphatidic acid phosphatidic acid biosynthetic process The chemical reactions and pathways resulting in the formation of phosphatidic acid, any derivative of glycerol phosphate in which both the remaining hydroxyl groups of the glycerol moiety are esterified with fatty acids. phosphatidic acid anabolism phosphatidic acid biosynthesis phosphatidic acid formation phosphatidic acid synthesis phosphatidic acid metabolic process glycerophospholipid biosynthetic process