Its twisted, double-helix structure is one of the most iconic images in the scientific world. RNA gets a little less attention than DNA, ... Part 2: The Pentose Sugar.

Purines are one of three components of nucleotides; phosphate esters of a pentose sugar (either ribose or deoxyribose) in which a purine or pyrimidine base is linked to C1 of the sugar.

IN a recent issue of Nature1, Caspersson and Schultz stress the importance of the occurrence of pentose-nucleotides in the nucleus and especially in the cytoplasm of cells in rapid mitotic division.