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Definition of Lysine

Lysine: An amino acid, one of the 20 building blocks of protein. A dietary essential amino acid, lysine is present in many proteins and is necessary for optimal growth in childhood. Symbol: Lys.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=22830
Last Editorial Review: 6/14/2012

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