Directions for Laboratory Work in Physiological Chemistry
The book Directions for Laboratory Work in Physiological Chemistry was written by author Holmes Condict Jackson Here you can read free online of Directions for Laboratory Work in Physiological Chemistry book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Directions for Laboratory Work in Physiological Chemistry a good or bad book?
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4. Pancreatic rennin a coagulating enzyme acting on the caseinogen of milk in a way somewhat similar to the gastric rennin. Various extracts of the pancreatic gland 56 PANCREATIC DIGESTION. 57 have been prepared each with a view to obtaining predominat- ing reactions for the specific enzyme. (See Appendix. ) TRYPSIN AND TRYPSINOGEN. Trypsin is active in an alkaline, faintly acid or neutral solution, but its maximum reaction occurs in a 1 per cent solution of Na 2 C0 3 . It is killed at a temper...ature about 55 C. Use the proteolytically active pancreatic extract and prepare test-tube digestions in the water-bath at 40 C. ; as under gastric digestion. (a) Fibrin + 5 c. C. Of the pancreatic extract. (&) " +5" " " " " +2 c. C. 0. 5% Na 2 C0 3 . Compare the manner of action of the trypsin upon the fibrin to that of the pepsin. (c) Fibrin + 5 c. C. Of 0. 5% Na 2 C0 3 . (d) " + 5 " " " " " +5 c. C. Pancreatic ex- tract which has been previously boiled and cooled. TRYPTIC PROTEOLYSIS. As regards its proteolytic activity, the enzyme trypsin is more energetic and far-reaching than pepsin.
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