groups of hamsters were given intratracheal injections of pla2 ( 0.3 units ) or one of the expected hydrolytic products of pla2 in equimolar concentrations , lysopc ( 135 micrograms ) , arachidonic acid ( aa ) ( 100 micrograms ) , or palmitic acid ( pa ) ( 70 micrograms ) with or without ppe ( 4 units ) .
C0031667
pla2
C0020291
hydrolytic