Specificity:MAbs 3C2, 3C5, 3C6: epitope specificity group I MAb 3C1: epitope specificity group IVa or II MAb 3C4: epitope specificity group IV MAb 3C8: epitope specificity group V Epitope specificity is given per ISOBM classification. MAbs are not cross-reacting with human leukocytes in cytofluorometry.