Phenotype of tetramer-positive T cells ex vivo from multiparous and memory mice. (A-C) Multiparous females of various H2^b strains: HW80 (A), C3H.SW (B), and B6/Ei (C). (D) Nulliparous B6/Ei mouse. (E) Memory phenotype of tetramer-positive cells from memory (open squares) and multiparous (filled symbols) mice. The activation state of HY^DbUty-specific T cells from multiparous B6.EiJ (squares), C3H.SW/SnJ (inverted triangles), B6.HLA-A2 (diamonds), HW-80 (circles) mice, and B6.EiJ females mated with C3H.SW/SnJ males (triangles) were analyzed using antibodies against CD45RB and CD62L. Bars indicate means.