13] IMMUNOLOGY OF RIBONUCLEASE 



Table 1 



PRECIPITATION OF RIBONUCLEASE BY RABBIT ANTIBODY 



Addition of increasing amounts of ribonuclease to 005 ml. of serum 619 

 Rn = Ribonuclease 



245 



* Calculated assuming identical N content for ribonuclease and antibody, a molecular 

 weight 13,680 for ribonuclease (Hirs, Moore and Stein 1956) and of 160,000 for rabbit antibody. 



Table 2 



MOLECULAR RATIO (RABBIT ANTIBODY/RIBONUCLEASE A) IN 

 REGION OF ANTIGEN EXCESS; SERUM 619 



Rn= Ribonuclease A 



* All values determined on 2/3 of supernatant. 

 t From serum added to supernatant. 



