Cytosine is one of the four nucleotide bases found in DNA and RNA, along with adenine, guanine, and thymine. It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached. The nucleoside of cytosine is cytidine. In Watson–Crick base pairing, it forms three hydrogen bonds with guanine.
Uracil is one of the four nucleotide bases in the nucleic acid RNA. The others are adenine (A), cytosine (C), and guanine (G). In RNA, uracil binds to adenine via two hydrogen bonds. In DNA, the uracil nucleobase is replaced by thymine (T). Uracil is a demethylated form of thymine.
In enzymology, a 1-aminocyclopropane-1-carboxylate deaminase (EC 3.5.99.7) is an enzyme that catalyzes the chemical reaction
In enzymology, 2-aminomuconate deaminase (EC 3.5.99.5) (also known as amnd) is an enzyme that catalyzes the chemical reaction
In enzymology, an adenine deaminase (EC 3.5.4.2) is an enzyme that catalyzes the chemical reaction
In enzymology, an adenosine-phosphate deaminase (EC 3.5.4.17) is an enzyme that catalyzes the chemical reaction
In enzymology, an ADP deaminase (EC 3.5.4.7) is an enzyme that catalyzes the chemical reaction
In enzymology, an amidase (EC 3.5.1.4, acylamidase, acylase (misleading), amidohydrolase (ambiguous), deaminase (ambiguous), fatty acylamidase, N-acetylaminohydrolase (ambiguous)) is an enzyme that catalyzes the hydrolysis of an amide. In this way, the two substrates of this enzyme are an amide and H2O, whereas its two products are monocarboxylate and NH3.
In enzymology, an ATP deaminase (EC 3.5.4.18) 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 blasticidin-S deaminase (EC 3.5.4.23) is an enzyme that catalyzes the chemical reaction
In enzymology, a creatinine deaminase (EC 3.5.4.21) is an enzyme that catalyzes the chemical reaction
In enzymology, a dCTP deaminase (EC 3.5.4.13) is an enzyme that catalyzes the chemical reaction
In enzymology, a dCTP deaminase (dUMP-forming) (EC 3.5.4.30) is an enzyme that catalyzes the chemical reaction
In enzymology, a deoxycytidine deaminase (EC 3.5.4.5) is an enzyme that catalyzes the chemical reaction
In enzymology, a diaminohydroxyphosphoribosylaminopyrimidine deaminase (EC 3.5.4.26) is an enzyme that catalyzes the chemical reaction
In enzymology, a glucosamine-6-phosphate deaminase (EC 3.5.99.6) is an enzyme that catalyzes the chemical reaction
In enzymology, a guanosine deaminase (EC 3.5.4.15) is an enzyme that catalyzes the chemical reaction
In enzymology, a nicotinamidase (EC 3.5.1.19) is an enzyme that catalyzes the chemical reaction
In enzymology, a pterin deaminase (EC 3.5.4.11) is an enzyme that catalyzes the chemical reaction
