Antigenic specificity of CLL-derived BCR belonging to the same stereotype subset. In the ELISA nFabs derived from subsets 4 and 5, samples were incubated with Fam32A protein (A) or calcyclin-binding protein (B), respectively. The 4 subset-4 derived BCRs reacted specifically with CACYBP, whereas the 6 subset-5 derived BCRs bound specifically to Fam32A protein. (C) Fabs derived from subset-1 BCR reacted specifically with oxLDL. Gray columns, LDL; black columns, oxLDL.