- A common epitope identified by a monoclonal antibody, MID 2, present on all leucocytes and associated with a group of high molecular weight glycopeptides. Banga, J.P., Guarnotta, G., Harte, A., Pryce, G., Campbell, M.A., Quartey-Papafio, R., Lydyard, P.M., Roitt, I.M. Scand. J. Immunol. (1984)