抄録
1. Phosphatidyl serine fraction prepared by Folch's method from crude cephalin was the most reactive factor in CCF reaction, as compared with other fractions.
2. Lecithin inhibited the precipitation of serum proteins or λ-globulin by phosphatidyl serine suspension. The CCF reagent with constant potency could be prepared by mixing of lecithin with phosphatidyl serine fraction in a proper ratio.
3. Lecithin also stabilized the CCF reagent suspension for a few days' storage.
