the sialic acids of the crude glycoproteins isolated from normal ileum were significantly less neuraminidase-susceptible and more c4 substituted ( p less than 0.01 ) than those of the glycoproteins isolated either from normal upper small intestine ( duodenum and jejunum ) or from cases of crohn 's disease of the ileum .
C0021852
small intestine
C0022378
jejunum