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The development of the digestive system of the young animal IV. Proteolytic enzyme development in the young lamb

Published online by Cambridge University Press:  27 March 2009

D. M. Walker
D. M. Walker
Affiliation:
Royal Veterinary College, Camden Town, London, N.W. 1
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Extract

1. The digestive organs and contents of twelve lambs, varying in age from 1 to 5 weeks, have been examined for their proteolytic enzyme activity at pH 1·8, 3·5 and 8·5.

2. Enzyme activity at 1·8 was present only in the abomasum and its contents.

3. All tissues and contents examined were active on haemoglobin at pH 3·5.

4. Small intestine contents and pancreas alone were active on azocasein at pH 8·5.

5. The majority of tissues and contents increased their proteolytic activity with increase in age. The abomasum wall, however, increased in activity up to 21 days and thereafter decreased, both at pH 1·8 and 3·5.

6. Milk-clotting action was measured on abomasum wall and contents. There was an absence of milk clots in the abomasum after 21 days, by which time rumen function had commenced.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 53 , Issue 3 , December 1959 , pp. 381 - 386
Copyright
Copyright © Cambridge University Press 1959

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