this factor , which is distinct from prostaglandins , epidermal cell-derived thymocyte activating factor ( etaf ) , and the well-known thymic hormones ( thymulin , thymopoietin , and thymosin alpha 1 ) did not exhibit any interleukin ( il ) -1 , il-2 , or il-3 activity .
C0040114
thymic hormones
C0040105
thymopoietin