sPLA2-IIA Inhibitor is a cyclic pentapeptide analog of FLSYK (cyclic 2-Nal-Leu-Ser-2-Nal-Arg (c2)), that binds to hGIIA (human IIA phospholipase A2) and inhibits its hydrolytic ability. sPLA2 is a member of the esterase superfamily that catalyzes the hydrolysis of the ester bond at the sn-2 position of glycerophospholipids, releasing free fatty acids such as arachidonic acid and lysophospholipids.