Escape and rumen degradable protein fractions in warm-season grasses

Daren D. Redfearn, Karla Jenkins

Research output: Chapter in Book/Report/Conference proceedingChapter

3 Scopus citations


Crude protein (CP) is routinely used to quantify protein concentration of forages. The CP concentration varies with forage species, plant part, plant maturity, and management practices. Ruminants derive their amino acid supply from microbial protein synthesized in the rumen, undegraded proteins, and amino acids that escape ruminal degradation. Rumen escape protein is the nondegraded or protected dietary proteins, amino acids, and peptides. A minimum rumen ammonia or CP level is needed for basal microbial protein synthesis. Therefore, it is essential to supply rumen degradable proteins in combination with high escape protein forages when rumen degradable protein of warm-season forage diets may be deficient. Protein degradation can be estimated by in vitro, in situ, or in vivo methods. Numerous attempts have been made to modify procedures for estimating forage protein degradation. Newer, innovative techniques such as sodium dodecyl sulfate-polyacrylamide gel electrophoresis and immunochemical techniques are being used more frequently to characterize forage proteins.

Original languageEnglish (US)
Title of host publicationNative Warm-Season Grasses
Subtitle of host publicationResearch Trends and Issues
Number of pages19
ISBN (Electronic)9780891186090
ISBN (Print)9780891185529
StatePublished - Oct 26 2015
Externally publishedYes


  • Escape protein
  • Forage protein composition
  • Forage protein degradation
  • Management practices
  • Microbial protein synthesis
  • Protein degradation techniques
  • Ruminant nitrogen usage
  • Warm-season grasses

ASJC Scopus subject areas

  • Engineering(all)
  • Agricultural and Biological Sciences(all)


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