PMID: 821842Mar 1, 1976

Alkaline phosphatase of human and calf small intestine. Purification and immunochemical characterization

Hoppe-Seyler's Zeitschrift für physiologische Chemie
M Khattab, G Pfleiderer


Alkaline phosphatase from human and calf small intestines has been prepared and purified until homogeneous, as judged by polyacrylamide gel electrophoresis, by means of the following techniques: n-butanol extraction, ammonium sulfate precipitation, acetone fractionation, ion exchange chromatography and isoelectric focusing in a sucrose density gradient. Three and two alkaline phosphatase froms from human and calf small intestines, respectively could be isolated by preparative isolectric focusing. The relative amounts of these components are not constant, but they have the same catalytic properties, suggesting that they may embody a common protein core with an identical active centre(s). Precipitating antisera for alkaline phosphatase from human and calf intestine have been prepard in rabbits by intramuscular, dermal, subcutaneous and intravenous administration of the pure major component of each enzyme species. Both antisera precipitate completely their homologous as well as their heterologous antigens (intestinal enzyme) and showed partial identity with placental alkaline phosphatase. There was no reaction with alkaline phosphatase from bone, liver heart, spleen, lung, stomach, pancreas, brain, bile-gall bladder and erythrocyt...Continue Reading


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