Suzanne Maroux

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By a slight modification of the procedure described by Gratecos et al. (Gratecos, D., Knibiehler, M., Benoit, V. and Sémériva, M. (1978) Biochim. Biophpys. Acta 512, 508-524), the basolateral and brush border membranes of rabbit enterocytes have been purified concomitantly from the same aliquot of mucosa. The two types of membrane have been obtained with(More)
Papain digestion of closed, right side out vesicles from pig, rat and rabbit jejunum brush border induces the release of the hydrolases bound to the membrane without grossly affecting the lipid bilayer limiting the vesicles. This observation definitely proves that intestinal hydrolases are surface components attached to the external side of the membrane.(More)
Antibodies raised against highly purified rabbit intestinal brush border aminopeptidase N were found in certain rabbits or pigs to crossreact with human blood-grouplike substances present in goblet cells and at the surface of the basolateral membrane of enterocytes. To obtain antibodies strictly specific for aminopeptidase, depletion of antibodies with a(More)
The antigen detected by the rat anti-mouse monoclonal antibody (m Ab), anti-BSP-3, has been initially described as a brain cell-surface protein. Evidence is presented that this m Ab recognizes mouse (Na++K+)-ATPase (ATP phosphohydrolase, E.C. The antigen, purified from mouse brain by means of affinity chromatography, migrated in SDS-polyacrylamide(More)
In vivo pulse-chase labeling of rabbit jejunum loops was used in conjunction with subcellular fractionation and quantitative immunoprecipitation to determine whether or not the newly synthesized aminopeptidase N transits through the basolateral membrane before it reaches the apical brush border, its final localization. The kinetics of the arrival of the(More)
The detergent and protease forms of rabbit intestinal aminopeptidase N were purfied for chemical investigations and future specific immunological labeling of the enzyme in situ. The purification of the detergent form required a special technique called 'reverse immunoabsorbant chromatography'. The specific activity of the detergent form finally obtained was(More)
Human blood group A antigenicity of glycoproteins is retained on epon-embedded jejunum sections after glutaraldehyde fixation and osmium treatment. The intracellular location of molecules bearing these determinants was visualized in the four types of epithelial cells of A+ rabbit jejunum sections with immuno-colloidal gold labeling. The brush border(More)