MeSH

5'-Uridylic acid. A uracil nucleotide containing one phosphate group esterified to the sugar moiety in the 2', 3' or 5' position.

Year introduced: 1991(1978)

A group of pyrimidine NUCLEOTIDES which contain URACIL.

Nucleotides in which the purine or pyrimidine base is combined with ribose. (Dorland, 28th ed)

Year introduced: 1973(1971)

A family of 6-membered heterocyclic compounds occurring in nature in a wide variety of forms. They include several nucleic acid constituents (CYTOSINE; THYMINE; and URACIL) and form the basic structure of the barbiturates.

Year introduced: THONZYLAMINE was heading 1972-1984 (Prov 1972)

Pyrimidines with a RIBOSE and phosphate attached that can polymerize to form DNA and RNA.

Year introduced: 1974(1972)

The monomeric units from which DNA or RNA polymers are constructed. They consist of a purine or pyrimidine base, a pentose sugar, and a phosphate group. (From King and Stansfield, A Dictionary of Genetics, 4th ed)

Complex compounds of high molecular weight occurring in living cells. These are basically of two types, ribonucleic (RNA) and deoxyribonucleic (DNA) acids, both of which consist of nucleotides (nucleoside phosphates linked together by phosphate bridges).

Year introduced: 1998

Organic compounds that contain a ring structure made up of carbon and one or more additional elements such as nitrogen and oxygen.

Year introduced: 1998

Cyclic compounds that include atoms other than carbon in their ring structure.