antigens encoded by the gag and env genes of the human t-lymphotropic virus type iii/lymphadenopathy associated virus ( htlv-iii/lav ) include a p55 gag polyprotein that yields p24 as the major virus core protein , and an env gene polyprotein , gp 160 , that produces gp 120 , the most immunogenic protein in humans , at the amino terminus .
C0017279
gag
C0042776
virus