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Sera from rabbits immunized with synthetic peptide analogues of La/SSB are tested against peptide 3 (301VTWEVLEGEVEKEALKKI318) (top) and peptide 4 (349GSGKGKVQFQGKKTKF364) (bottom). Sera from animals immunized with peptide 2 also contained antibodies to peptides 3 and 4. In addition, sera from all animals contained antibodies to peptide 4.
