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Branched-chain amino acids: Wikis

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The phrase branched-chain amino acids or BCAA is sometimes used to refer to the amino acids having aliphatic side-chains that are non-linear. These are leucine, isoleucine and valine.[1]

The combination of these three essential amino acids makes up approximately 1/3 of skeletal muscle in the human body, and plays an important role in protein synthesis. BCAA’s are currently used clinically to aid in the recovery of burn victims, as well as for supplementation for strength athletes. Unlike other amino acids that when consumed in free form which are absorbed and processed by the liver, branched chain amino acids are absorbed directly by muscle tissue.

Contents

Degradation

The body uses branched chain aminotransferase and 3-methyl-2-oxobutanoate dehydrogenase to degrade branched-chain amino acids.

Bcaapathway2.jpg

References and notes

  1. ^ "Branched chain amino acids". LifeHugger. http://mc.lifehugger.com/moc/879/branched_chain_amino_acids. Retrieved 2009-09-23.  
  • Karlsson HK, Nilsson PA, Nilsson J, Chibalin AV, Zierath JR, Blomstrand E (2004). "Branched-chain amino acids increase p70S6k phosphorylation in human skeletal muscle after resistance exercise". Am. J. Physiol. Endocrinol. Metab. 287 (1): E1–7. doi:10.1152/ajpendo.00430.2003. PMID 14998784.  
  • Blomstrand E, Eliasson J, Karlsson HK, Köhnke R (2006). "Branched-chain amino acids activate key enzymes in protein synthesis after physical exercise". J. Nutr. 136 (1 Suppl): 269S–73S. PMID 16365096.  
  • Norton LE, Layman DK (2006). "Leucine regulates translation initiation of protein synthesis in skeletal muscle after exercise". J. Nutr. 136 (2): 533S–537S. PMID 16424142.  

See also

External links

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