phosphodiester bond

[ fŏs′fō-dī-ĕstər ]

n.

The covalent chemical bond that holds together the polynucleotide chains of RNA and DNA by joining a specific carbon in the phosphate group in a sugar having five carbons, such as ribose, to a specific carbon in the hydroxyl group of the five-carbon sugar in the adjacent nucleotide.

Words nearby phosphodiester bond