Definition of ornithine in English:

ornithine

noun

Biochemistry
  • An amino acid produced by the body that is important in protein metabolism.

    • ‘This may occur in part as a result of pathologically elevated activity of arginase, an enzyme that hydrolyzes arginine to ornithine and urea.’
    • ‘When your body doesn't digest protein completely, gut bacteria convert two of the amino acids in protein, arginine and ornithine, to compounds called polyamines.’
    • ‘About 50-percent of ingested arginine is rapidly converted in the body to ornithine, primarily by the enzyme arginase.’
    • ‘The trial was investigating a treatment for a genetic liver condition, where a gene for a liver enzyme, ornithine trans-carbamylase, is either missing or defective.’
    • ‘He was undergoing treatment for ornithine transcarbamylase deficiency, a disorder that prevents the liver from effectively processing ammonia, a toxin produced in the breakdown of proteins.’

Origin

Late 19th century: from ornitho- (with reference to a constituent found in bird excrement) + -ine.

Pronunciation:

ornithine

/ˈôrnəˌTHēn/