- Monoclonal antibodies VIB-E3, IB5 and HB9 to the leucocyte/epithelial antigen CD24 resemble BA-1 in recognizing sialic acid-dependent epitope(s). Evidence that VIB-E3 recognizes NeuAc alpha 2-6GalNAc and NeuAc alpha 2-6Gal sequences. Larkin, M., Knapp, W., Stoll, M.S., Mehmet, H., Feizi, T. Clin. Exp. Immunol. (1991)