iGen3 02-07

Deoxyribose versus Ribose sugars

    Ribose is a single-ring pentose [5-C] sugar. The numbering of the carbon atoms runs clockwise, following organic chemistry rules.

Note the absence of the hydroxyl (-OH) group on the 2’ carbon in the deoxy-ribose sugar in DNA as compared with the ribose sugar in RNA.

Figure © 2010 PJ Russell, iGenetics 3rd ed.; all text material © 2010 by Steven M. Carr