The inactive precursor , lyso-platelet-activating factor , at a concentration as high as 10 ( -7 ) M had no effect on any of the membrane phospholipids .
the inactive precursor , lyso-platelet-activating factor , at a concentration as high as 10 ( -7 ) m had no effect on any of the membrane phospholipids .
O O O O B-protein_molecule I-protein_molecule O O O O O O O O O O O O O O O O O O O B-lipid I-lipid O