Structure determination by 1H NMR spectroscopy of (sulfated) sialylated N-linked carbohydrate chains released from porcine thyroglobulin by peptide-N4-(N-acetyl-beta-glucosaminyl)asparagine amidase-F. (1991)

de Waard P, Koorevaar A, Kamerling J, Vliegenthart J
J Biol Chem, 1991 vol.266:4237-4243