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From proinsulin-free insulin we obtained maximal purified insulin by means of preparative polyacrylamide electrophoresis (PADE). This substance appears in the analytical PADE as a uniform band and possesses glycine and phenylalanine as N-terminal amino acids. By use of the eviscerated rabbit as testing model, the product displays a higher hypoglycemic activity as compared with the Toronto standard.
A method for the preparation of UDP-glucose from HClO 4 -extract of diaphragm using paper-chromatography is described. It allows the quantitative determination of UDP-Glc by optical test and the measurement of its specific (14-C) activity simultaneously.