CD8 and CD4. The box and the rod.
Parham
P
P
D015704:CD4 Antigens / Q000737:chemistry* / Q000378:metabolism; D016827:CD8 Antigens / Q000737:chemistry* / Q000378:metabolism; D015395:Histocompatibility Antigens Class I / Q000378:metabolism; D000949:Histocompatibility Antigens Class II / Q000378:metabolism; D015394:Molecular Structure
D015704:CD4 Antigens; D016827:CD8 Antigens; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II