Gray, G M Intestinal beta-galactosidases. I. Separation and characterization of three enzymes in normal human intestine. [electronic resource] - The Journal of clinical investigation Apr 1969 - 716-28 p. digital Publication Type: Journal Article ISSN: 0021-9738 Standard No.: 10.1172/JCI106029 doi Subjects--Topical Terms: ChromatographyChromatography, GelGalactosidases--classificationHumansHydrogen-Ion ConcentrationIntestine, Small--enzymologyKineticsLactose Intolerance--enzymologyUltracentrifugation