Biochemistry

СН 2 ОН с=о I СН 2 ОН Glycerin aldehyde (glyceralhydride, aldose) Dioxiacetone (dehydroacetone, ketose) The general formula of pentosis is C 5 Ню O 5 . They are synthesized by plants and are part of many compounds of animal organisms. The most important are arabinose, xylose, ribose and deoxyribose. Arabinose ( L and D ) is found in plant mucus, pectin, hemicellulose, gum arabic, cherry glue, etc. H HO -4 — H H ------- OH H ------ OH CH2OH D-Arabinose H ------- OH HO HO CH 2 OH L-Arabinose H H D- xylulose and D- ribulose are formed in humans and animals in the pentose phosphate cycle of glucose oxidation. They are involved in the biosynthesis of nucleic acids. CH2OH CH 2 OH c = 0 c - 0 H -с- OH HO-C- f - H H -с- OH 1 CH2OH H-C- 1 - OH CH2OH D- ribulose D- xylulose 140