. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BILIARY AMYLASE IN THE DOMESTIC FOWL 243 relative rates of secretion of bile and pancreatic juice are known. No information concerning this is available for the domestic fowl at the present time. Since the liver is generally supposed to contain a starch-splitting enzyme, "glycogenase," the question arises as to the possibility that biliary amylase and "glycogenase" are identical. The author has no evidence concerning this. Any consideration of this possible identity must take into account the conclusion o
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BILIARY AMYLASE IN THE DOMESTIC FOWL 243 relative rates of secretion of bile and pancreatic juice are known. No information concerning this is available for the domestic fowl at the present time. Since the liver is generally supposed to contain a starch-splitting enzyme, "glycogenase," the question arises as to the possibility that biliary amylase and "glycogenase" are identical. The author has no evidence concerning this. Any consideration of this possible identity must take into account the conclusion of Cori and Cori (1938) that glycolysis in the liver is due to the action of an enzyme system rather than to the action of a single enzyme, "glycogenase," as formerly supposed. SUMMARY The bile of the domestic fowl contains an amylase which is secreted by the liver. Its optimum hydrogen ion concentration is similar to that of pancreatic amylase. The amylolytic activity of pancreatic juice was found to be 10-800 times that of bile. A cknowledgments The author wishes to thank the Department of Poultry Husbandry for the experimental birds, and Professor C. A. Herrick, Departments of Zoology and Veterinary Science, for laboratory facilities and for advice and assistance in performing operations. LITERATURE CITED CORI, G. T., AND C. F. CORI, 1938. Enzymatic breakdown of glycogen in liver extracts. Proc. Soc. Exp. Biol. Med., 39: 337-338. FOSSEL, M., 1931. Gallen- und Gallenwegstudien. V. Ueber die Herkunst der Gallenamylasen. Pflueg. Arch. ges. Physiol, 228: 764-771. JACOBSON, J., 1865. De sacchari formatione fermentoque in jecore et de fermento in bile. Inaug. Dissert. Koenigsberg, 1865. LOEHNER, L., 1929. Gallen- und Gallenwegstudien. IV. Zur Entscheidung der Gallenamylasen- frage. Pflueg. Arch. ges. Physiol., 223: 436-449. SHAFFER, P. A., AND M. SOMOGYI, 1933. Copper-iodometric reagents for sugar determination. Jour. Biol. Chem., 100: 695-713. STRESEMANN, E., 1934. In Ku
Size: 1436px × 1739px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
