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13.3 Fischer Projections of Monosaccharides
Draw the d and l configurations of the projections.
A pair of enantiomers can be identified.
The projections for the d and d and l are for ribose, a five-carbon monosaccharide, and the d and l are forglucose.
The chain is numbered from top to bottom.
The OH groups on carbon atoms are reversed so that they are not on the same side of the molecule.
There are OH groups drawn on the left side of the vertical line and on the right side of the mirror image.
The compound is called d- or l-ribulose.
The carbon chain starts at the top of the projection.
The carbon is farthest from the projection.
The farthest from the top is carbon 4.
The OH group is on the right of carbon 4.
They all have the same formula and are isomers of each other.
Although we can draw projections for their d and l enantiomers, they are more commonly found in nature and used in the cells of the body.
D-fructose is popular with dieters because less calories is needed to provide a pleasant taste.
High-fructose corn syrup is a type of sweetener that is made when the sugars in corn syrup are converted to sugars.
A food label shows that high-fructose syrup is produced.
The sweetener used in soft drinks and bakery goods is 42% fructose corn syrup.
Kate's doctor ordered an oral test to evaluate her body's ability to return to normal blood sugar levels after she has eaten a certain amount of sugar.
Kate drank a solution containing 75 g vel.
The solution is given to the patient.
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