leucine (redirected from Leucine zipper)

leucine /leu·cine/ (Leu) (L) (loo´sen) an essential amino acid necessary for optimal growth in infants and for nitrogen equilibrium in adults.

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leu·cine (lsn)

n. Abbr. Leu

An essential amino acid derived from the hydrolysis of protein by pancreatic enzymes during digestion and necessary for optimal growth in infants and children and for the maintenance of nitrogen balance in adults.

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leucine

(loo´sēn),
n one of the essential amino acids. See also amino acid.

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leucine

Leu; a naturally occurring amino acid, essential for growth in the young and for nitrogen equilibrium in adults.

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leucine aminopeptidase

a digestive enzyme of small intestine enterocytes (brush border).

DL-leucine

synthetic form of leucine.

leucine enkephalin

leu-enkephalin; see enkephalin.

L-leucine

natural form of leucine.

leucine zipper

a structured motif found in some DNA binding regulatory proteins formed from a region of a-helix containing at least four leucines, each separated by six amino acids from one another; the leucines align along one edge of the a-helix with one leucine at every second turn of the helix such that the leucine of one protein can interdigitate with the leucines of another protein in a zipper manner.