Figure 3.

TH1 Vβ8⁺CD4⁺ clones and TH2 Vβ8⁺CD4⁺ clones express similar levels of Qa-1 on their surface. TH1 (Upper) and TH2 (Lower). CD4⁺ T cell clones were stained with antisera to Qa-1^a (bold solid lines), Qa-1^b (thin solid lines), or with normal B10.PL serum (dotted lines) as described in Materials and Methods. CD4⁺ T cell lines were stained on day 6 after activation.