Proliferative responses of T cells from NZB mice to a panel of peptides spanning the sequence of the dominant murine RBC autoantigen Band 3, and against the purified protein. Each bar represents the stimulation index of the peak response of T cells pooled from the spleens from individual mice aged 20 weeks. Each of the 92 peptides was tested on between 5 and 8 mice. The horizontal line indicates the minimum level of a positive response (SI > 3).