2,6-Diaminohexanoic acid; the l-isomer is a nutritionally essential α-amino acid of mammals found in many proteins; distinguished by an ε-amino group.
- l. decarboxylase an enzyme that catalyzes the decarboxylation of l-l., with the production of cadaverine and CO2.
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ly·sine 'lī-.sēn n a crystalline essential amino acid C6H14N2O2 obtained from the hydrolysis of various proteins abbr. Lys
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n.
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ly·sine (Lys) (K) (liґsēn) an essential amino acid, α,ε-diaminocaproic acid, a hydrolytic product of protein first isolated from casein; necessary for optimal growth in infants and for maintenance of nitrogen equilibrium in human adults. See table at amino acid.Medical dictionary. 2011.