guanylate cyclase [ gtp pyrophosphate-lyase ( cyclizing ) , ec 4.6.1.2 ] activity of human platelet homogenates was stimulated by the addition of phospholipase a2 or unsaturated fatty acids such as oleic , vaccenic , linoleic , linolenic , eicosenoic , eicosadienoic , and arachidonic acids .
C0018358
guanylate cyclase
C0024188
lyase