Biochemistry For Dummies by John T. Moore

Author:John T. Moore
Language: eng
Format: epub
Publisher: Wiley
Published: 2011-07-05T04:00:00+00:00

The nucleoside’s name comes from the nitrogen base if the sugar is ribose; it has a prefix if the sugar is deoxyribose. For example, adenine combines with ribose to form adenosine and combines with deoxyribose to form deoxyadenosine. The structure of the nucleoside adenosine is shown in Figure 9-6.

Figure 9-6: Structure of the nucleoside adenosine.

Second reaction: Phosphoric acid + nucleoside = nucleotide

The combination of a phosphoric acid with a nucleoside produces a nucleotide, which is a phosphate ester of a nucleoside. The formation involves a condensation reaction between the phosphoric acid and the alcohol group on carbon number 5, the –CH2OH (see Figure 9-7).

Figure 9-7: Simplified representation of the formation of a nucleotide.

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