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essential amino acid

DEFINITIONS OF: essential amino acid

1

n an amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet

Types:
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arginine
a bitter tasting amino acid found in proteins and necessary for nutrition; its absence from the diet leads to a reduced production of spermatozoa
histidine
an essential amino acid found in proteins that is important for the growth and repair of tissue
isoleucine
an essential amino acid found in proteins; isomeric with leucine
leucine
a white crystalline amino acid occurring in proteins that is essential for nutrition; obtained by the hydrolysis of most dietary proteins
lysine
an essential amino acid found in proteins; occurs especially in gelatin and casein
methionine
a crystalline amino acid containing sulfur; found in most proteins and essential for nutrition
phenylalanine
an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body
threonine
a colorless crystalline amino acid found in protein; occurs in the hydrolysates of certain proteins; an essential component of human nutrition
tryptophan, tryptophane
an amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin
valine
an essential amino acid found in proteins; important for growth in children and nitrogen balance in adults
Type of:
amino acid, aminoalkanoic acid
organic compounds containing an amino group and a carboxylic acid group
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