Our previous studies showed that the parental (NB_1) and N-glycan mutant (NB_1(-Mgat1), NB_1(-Mgat2), and NB_1(-Mgat3)) Neuroblastoma (NB) cell lines have compromised N-acetylglucosaminyltransferase activities: GnT-I, GnT-II, or GnT-III. The gene discussed is MGAT2; the disease is neuroblastoma.