Directions for Laboratory Work in Physiological Chemistry
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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.
What to read after Directions for Laboratory Work in Physiological Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Holmes Condict Jackson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
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.
What to read after Directions for Laboratory Work in Physiological Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Holmes Condict Jackson to read onlineMoreLess
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