PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 3487029-3 1986 The differences in charge heterogeneity of class I molecules between activated T-cells and the other cell subpopulations were abolished by treatment with: (1) endoglycosidase F which removes N-linked oligosaccharides from glycoproteins, and (2) neuraminidase which removes sialic acids from carbohydrate side chains. n-linked oligosaccharides 191-216 neuraminidase 1 Homo sapiens 245-258