Sialic Acids 6 Trypanosoma cruzi 6 alpha-Fetoproteins article 6 Enzyme Inhibitors 4 Galactose 4 Galactose oxidase 4 Glycoproteins 4 Inhibitors 4 Mammalia 4 Neuraminidase 4 Oligosaccharides 4 Staining and Labeling 4 Structure-Activity Relationship 4 Tetra 4 Trans-sialidase 4 anion exchange chromatography 4 carbohydrate analysis 4 enzyme inhibition 4 enzyme substrate 4 fetuin 4 glycosylation 4 nonhuman 4 priority journal 4 sialic acid 4 sialidase 4 sialidase inhibitor 4 spectrophotometry 4 Animal 2 Chromatography, Paper 2