the effects of thymosin fraction 5 ( f5 ) , an extract of bovine thymus containing multiple polypeptides , on the proliferation of cultured t cells ( ctc ) , a continuously proliferating subpopulation of peripheral blood t lymphocytes , stimulated by either phytohemagglutinin ( pha ) or delectinated interleukin 2 ( il-2 ) were studied .
C1155046
proliferation
C0021756
interleukin 2