Carbohydrate Expression in the Intestinal Mucosa Jr. Thomas Redensarten FACR Redensarten Aber die synthetische Funktion dieses Ich habe er unvollständig konzipiert: nur halbseitig By being in contact with a large number of potentially harmful substances and infectious organisms 93 VII Abbreviations AB Alcian blue AB PAS Alcian blue periodic acid Schiff ABC avidin biotin complex amine precursor uptake and decarboxylation APUD CCK cholecystokinin Cv conventional CV P conventional animal fed purified diet conventional animal fed commercial diet CV C DAB diaminobenzidine EC enteroglucagon follicle associated epithelium FAE FITC fluorescein isothiocyanate GALT gut associated lymphoid tissue GF germ free GF P germ free animal fed purified diet GF C germ free animal fed commercial diet GLI grey level index haematoxylin and eosin H&E HFA human flora associated HFA P human flora associated fed purified diet IBAS interaktives Bild Analyse System PAS periodic acid Schiff PYY peptide with tyrosine (Y) at the N terminus and tyrosine (Y) amide at the C terminus scm severe combined immunodeficiency SCFA short chain fatty acid SIR serotonin immunoreactive Abbreviations for lectins and their specific sugars are shown in Tables 2