What are the different phospholipases that act to hydrolyze the ester linkages of the groups attached to the various carbon atoms of glycerol? At which carbon atom of glycerol are you most likely to have arachidonate bound? Which of the phospholipases releases arachidonic acid? Which phospholipid is likely to have arachidonate as one of the acyl chains attached to glycerol? Which phospholipase releases diacylglycerol and the phosphoryl head group?