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Define D- and L- isomers.Topic : Monosaccharides |
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Answer» - and L- isomers are mirror image of each other.» The spatial orientation of -H and -OH group on the carbon atom ( for glucose) that is ADJACENT to the terminal primary ALCOHOL carbon determines whether the sugar is D- or L- isomer.» If the -OH group is on the right side, the sugar is of D-series, and if on the left side, it belongs to L-series.» The STRICTURES of D- and L- glucose BASED on the reference mono-saccharide, D- and L- glyceraldehyde are attached. (↑)It may be noted that the naturally occurring monosaccharides in the mammalian tissues are mostly of D-configuration. The enzyme machinery of cells is specific to METABOLISE D-series of monosaccharides. |
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