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Breakdown of different peptides byPrevotella (Bacteroides) ruminicola and mixed microorganisms from the sheep rumen

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Abstract

Several di-, tri-, and oligopeptides were incubated individually in vitro with rumen fluid from two sheep receiving a mixed grass hay/concentrate diet and with washed cells ofPrevotella (formerlyBacteroides)ruminicola M384 andP. ruminicola B14. The rates of breakdown of most peptides were similar in the rumen fluid from the two sheep. Acidic and proline-containing peptides tended to be more slowly degraded than neutral or basic peptides. The dipeptide at the N-terminus of higher peptides was observed as an early product of hydrolysis, confirming that a dipeptidyl aminopeptidase type of activity was present. The relative rates of breakdown of dipeptides byP. ruminicola were different from that of rumen fluid, but the hydrolysis of higher peptides followed a similar pattern, and dipeptides from the N-terminus were detected as early products.

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Authors and Affiliations

  1. Rowett Research Institute, Bucksburn, AB2 9SB, Aberdeen, UK

    R. John Wallace & Nest McKain

  2. U.S. Dairy Forage Research Center, Madison, Wisconsin, USA

    Glen A. Broderick

Authors
  1. R. John Wallace
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  2. Nest McKain
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  3. Glen A. Broderick
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Wallace, R.J., McKain, N. & Broderick, G.A. Breakdown of different peptides byPrevotella (Bacteroides) ruminicola and mixed microorganisms from the sheep rumen. Current Microbiology 26, 333–336 (1993). https://doi.org/10.1007/BF01576265

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  • DOI: https://doi.org/10.1007/BF01576265

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