Proteolytic activity in extracts of lymphatic tissue has been described in the older literature,11 gelatin, casein, and serum albumin having been used as substrates. More recently bovine tonsils were reported to contain a protease that cleaves serum albumin.7 Rothschild and Junqueirae found proteolytic activity in lymph node homogenates, using globin as substrate. In the present investigation, ...
