Nucleotides are organic molecules composed of a nitrogenous base, a pentose sugar and a phosphate. They serve as monomeric units of the nucleic acid polymers – deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), both of which are essential biomolecules within all life-forms on Earth. Nucleotides are obtained in the diet and are also synthesized from common nutrients by the liver.
The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions that produces urea (NH2)2CO from ammonia (NH3). Animals that use this cycle, mainly amphibians and mammals, are called ureotelic.
Carbamic acid, which might also be called aminoformic acid or aminocarboxylic acid, is the chemical compound with the formula H2NCOOH. It can be obtained by the reaction of ammonia NH3 and carbon dioxide CO2 at very low temperatures, which also yields ammonium carbamate [NH4]+[NH2CO2]−. The compound is stable only up to about 250 K (−23 °C); at higher temperatures it decomposes into those two gases. The solid apparently consists of dimers, with the two molecules connected by hydrogen bonds between the two carboxyl groups –COOH.
Carbamoyl phosphate synthetase (glutamine-hydrolysing) is an enzyme that catalyzes the reactions that produce carbamoyl phosphate in the cytosol. Its systemic name is hydrogen-carbonate:L-glutamine amido-ligase .
In enzymology, a L-aspartate oxidase (EC 1.4.3.16) is an enzyme that catalyzes the chemical reaction
The enzyme carbamoyl-serine ammonia-lyase (EC 4.3.1.13) catalyzes the chemical reaction
In enzymology, a 2-(acetamidomethylene)succinate hydrolase (EC 3.5.1.29) is an enzyme that catalyzes the chemical reaction
In enzymology, a 2-(hydroxymethyl)-3-(acetamidomethylene)succinate hydrolase (EC 3.5.1.66) is an enzyme that catalyzes the chemical reaction
In enzymology, a beta-ureidopropionase (EC 3.5.1.6) is an enzyme that catalyzes the chemical reaction
In enzymology, a carboxymethylhydantoinase (EC 3.5.2.4) is an enzyme that catalyzes the chemical reaction
In enzymology, a citrullinase (EC 3.5.1.20) is an enzyme that catalyzes the chemical reaction
In enzymology, a cyanoalanine nitrilase (EC 3.5.5.4) is an enzyme that catalyzes the chemical reaction
In enzymology, a formimidoylaspartate deiminase (EC 3.5.3.5) is an enzyme that catalyzes the chemical reaction
In enzymology, a glutamin-(asparagin-)ase (EC 3.5.1.38) is an enzyme that catalyzes the chemical reaction
In enzymology, a N-carbamoyl-D-amino acid hydrolase (EC 3.5.1.77) is an enzyme that catalyzes the chemical reaction
In enzymology, a N-carbamoyl-L-amino-acid hydrolase (EC 3.5.1.87) is an enzyme that catalyzes the chemical reaction
In enzymology, a N-carbamoylputrescine amidase (EC 3.5.1.53) is an enzyme that catalyzes the chemical reaction
In enzymology, a N-carbamoylsarcosine amidase (EC 3.5.1.59) is an enzyme that catalyzes the chemical reaction
In enzymology, a N-succinylarginine dihydrolase (EC 3.5.3.23) is an enzyme that catalyzes the chemical reaction
Ammonium carbamate is a chemical compound with the formula [NH4][H2NCO2] consisting of ammonium cation NH+4 and carbamate anion NH2COO−. It is a white solid that is extremely soluble in water, less so in alcohol. Ammonium carbamate can be formed by the reaction of ammonia NH3 with carbon dioxide CO2, and will slowly decompose to those gases at ordinary temperatures and pressures. It is an intermediate in the industrial synthesis of urea (NH2)2CO, an important fertilizer.
