these monoclonal antibodies specifically recognize galnac monosaccharide sites located on the erythrocyte cell surface sialoglycoproteins , glycophorin a and glycophorin b , and do not bind to fixed normal red cells presenting the neu-nac alpha 2-3gal beta 1-3 ( neunac alpha 2-6 ) galnac alpha 1-o-ser ( thr ) tetrasaccharide or to fixed neuraminidase-digested cells presenting the gal-galnac disaccharide .
C0017954
erythrocyte
C0017955
glycophorin a