Labelled L-Lyxose is the enantiomer of D-Lyxose (L501000), a monosaccharide and a reducing carbohydrate present in maple syrup. It is used in molecular modeling calculations in the study of drug binding and recognition in relation to aldose reductase. L-Lyxose is also utilized by Escherichia coli, encoding a kinase for L-Xylulose (X750800).