ERBB2 and cancer: Two α2,3NeuAc-recognizing molecules were used: the Maackia amurensis lectin II (MAL-II), which harbors affinity towards α2,3NeuAc-containing glycan epitopes; and the CA-19.9 mAb, which recognizes the cancer-associated SLea antigen, previously shown to be carried by ErbB2 [8].