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Rumen proteolysis of constituent proteins of soyabean meal

Published online by Cambridge University Press:  24 November 2017

J.R. Newbold  and
S.R. Rust
J.R. Newbold
Affiliation:
Department of Animal Science, Michigan State University, East Lansing, MI 48824, USA
S.R. Rust
Affiliation:
Department of Animal Science, Michigan State University, East Lansing, MI 48824, USA
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Extract

Many feedstuffs consist of a variety of proteins which, differing in size and structure, may undergo proteolysis in the rumen at different rates. The conventional use of single, constant coefficients to describe the proportion of protein degraded in the rumen (e.g. 0.65 for soyabean meal) may, therefore, be inappropriate. Soyabeans contain two major storage proteins, β-conglycinin and glycinin. Two experiments were conducted to assess differences in rate of proteolysis between α and β sub-units of β-conglycinin (molecular weight approximately 66kD and 56kD, respectively) and acidic and basic sub-units of glycinin (approximately 36kD and 23kD, respectively).

Type
Rumen Metabolism
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1990 , March 1990 , pp. 29
Copyright
Copyright © The British Society of Animal Production 1990

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