a phosphate ester of a nucleoside; one of the monomeric components of DNA or RNA.
The fundamental unit of nucleic acids. A nucleotide consists of a nitrogen-containing base attached to a pentose monosaccharide with one, two, or three phosphate groups attached by ester linkages to the saccharide moiety.
unit building block of DNA. It consists of a sugar and phosphate backbone with a base attached.
A purine or pyrimidine base attached to a five-carbon sugar, to which a mono-, di-, or triphosphate is also attached. The monomeric unit of DNA and RNA.