ORNITHINE

Pronunciation (US):

(GB):

 Dictionary entry overview: What does ornithine mean? 

• ORNITHINE (noun)
  The noun ORNITHINE has 1 sense:

1. an amino acid that does not occur in proteins but is important in the formation of urea

  Familiarity information: ORNITHINE used as a noun is very rare.

 Dictionary entry details 

• ORNITHINE (noun)

Sense 1

Meaning:

An amino acid that does not occur in proteins but is important in the formation of urea

Classified under:

Nouns denoting substances

Hypernyms ("ornithine" is a kind of...):

amino acid; aminoalkanoic acid (organic compounds containing an amino group and a carboxylic acid group)

 Context examples 

A difluoromethylated ornithine compound with antineoplastic activity.

(Eflornithine, NCI Thesaurus)

Ornithine is one of the key reactants in the urea cycle that is responsible for 80% of the nitrogen excretion in the body.

(Ornithine, NCI Thesaurus)

Urea is released from arginine by the enzyme arginase, bringing the cycle back around to ornithine.

(Feeding Amino Groups into the Urea Cycle, NCI Thesaurus/BIOCARTA)

This protein plays a role in the cleavage of L-arginine to L-ornithine and urea.

(Arginase-1, NCI Thesaurus)

The hydrochloride form of eflornithine, a difluoromethylated ornithine compound with antineoplastic activity.

(Eflornithine Hydrochloride, NCI Thesaurus)

Ornithine carbamoyltransferase, mitochondrial (354 aa, ~40 kDa) is encoded by the human OTC gene.

(Ornithine Carbamoyltransferase, Mitochondrial, NCI Thesaurus)

Ornithine decarboxylase (461 aa, ~51 kDa) is encoded by the human ODC1 gene.

(Ornithine Decarboxylase, NCI Thesaurus)

This species is motile by peritrichous flagella, indole negative, ornithine decarboxylase negative and produces acid from dulcitol but not melibiose.

(Citrobacter youngae, NCI Thesaurus)

This allele, which encodes ornithine carbamoyltransferase, mitochondrial protein, plays a role in the mediation of the ornithine cycle.

(OTC wt Allele, NCI Thesaurus)

Ornithine, one of the starting materials for polyamine biosynthesis, is derived from the amino acid arginine as part of the urea cycle.

(Biosynthesis of Spermidine and Spermine Pathway, NCI Thesaurus/BIOCARTA)