Fig. 3.

Restricted usage of Vβ6·1 by Nef 56–68 T cell clones Amplification of specific Vβ gene segments was performed by PCR. (a) In Nef 56–68 specific CD4⁺ clones derived from 6 different HLA-typed healthy donors. (b) In Nef 56–68, HA 307–319 and TT 830–846 specific CD4⁺ clones derived from the same donor. The relative amount of TCR Vβ gene transcripts was described as the ratio (%) of each Vβ to total Vβ.