In organic chemistry, a tetrose is a monosaccharide with 4 carbon atoms. They have either an aldehyde (−CH=O) functional group in position 1 (aldotetroses) or a ketone (>C=O) group in position 2 (ketotetroses).[1][2]
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D-Erythrose -
D-Threose -
D-Erythrulose
The aldotetroses have two chiral centers (asymmetric carbon atoms) and so 4 different stereoisomers are possible. There are two naturally occurring stereoisomers, the enantiomers of erythrose and threose having the D configuration but not the L enantiomers. The ketotetroses have one chiral center and, therefore, two possible stereoisomers: erythrulose (L- and D-form). Again, only the D enantiomer is naturally occurring.
- ^ Lindhorst TK (2007). Essentials of Carbohydrate Chemistry and Biochemistry (1st ed.). Wiley-VCH. ISBN 978-3-527-31528-4.
- ^ Robyt JF (1997). Essentials of Carbohydrate Chemistry (1 ed.). Springer. ISBN 0-387-94951-8.