A.CD3 B.CD154 C.FcεRⅠ D.Igα/Igβ E.CD80/CD86
A.MHCⅠ類分子/CD8 B.MHCⅡ類分子/CD4 C.ICAM-1/LFA-1 D.LFA-3/LFA-2 E.CD80(CD86)/CD28
A.CD19 B.CD21 C.CD40 D.CD80/CD86 E.CD79a/CD79b