Steric mapping of some prostaglandin receptor sites

The Minimal Steric (Topologic) Difference method was applied to map some prostaglandin receptors. Experimental data concerning luteinizing activity of corpora lutea, and pressor respectively depressor activity on sheep blood were considered. The linear correlation coefficients obtained were r = 0.927 (N = 12) for luteinizing activity, r = 0.943 (N = 15) for depressor activity, and r = 0.943 (N = 12) for pressor activity. Similarities and differences between these three receptors are discussed.