the following cells were biosynthetically labeled for 4 hr [ ( 35 ) s ] methionine or 24 hr with [ ( 14 ) c ] leucine : ( 1 ) thymocytes , ( 2 ) cortisoneresistant thymocytes [ both treated with rabbit antisera cytotoxic to bone marrow-derived ( b ) lymphocytes and igm-containing plasma cells , to kill possible contaminating nonthymus-derived cells ] , ( 3 ) `` '' activated thymocytes '' '' ( allogeneic cell cultures of cortisone-resistant thymocytes ) , ( 4 ) human daudi cells ( a b lymphoblastic cell line ) , and ( 5 ) purified mouse b spleen lymphocytes devoid of plasma cells .
C0005953
bone marrow
C1516097
a b lymphoblast