“…There was no detectable migration of human leukocytes to peptides 1-20 or 161-180 of human IRBP, (which are uveitogenic in C57BL/6 mice and B10.RIII mice, respectively), in a 1 to 10 000-ng/mL range. Chemotactic responses were observed with lymphocytes isolated from healthy controls to S-Ag peptides corresponding to amino acids 1-20, 11-30, 41-60, 121-140, and 131-150 (Table 3), 3,17 but peptides corresponding to human S-Ag amino acids 141-160, 151-170, 161-180, and 171-190 did not induce migration when tested in the 1 to 1000-ng/mL range. Combined with data from published literature, our observations suggest that, unlike HisRS, S-Ag has multiple and distinct epitopes responsible for chemotaxis, leukocyte proliferation, and elicitation of autoantibodies (Table 3).…”