BIO NMDCAT Carbohydrates
nmdcat.online June 27, 2026

The formation of the cyclic structure of a monosaccharide creates a new chiral center at the anomeric carbon. For an aldohexose like glucose, the D designation refers to the configuration at C-5, while the α/β designation refers to the configuration at

A. C-1
B. C-2
C. C-4
D. C-6

📝 Explanation

The D/L designation is fixed by the configuration of the highest-numbered chiral center (C-5 in hexoses). The α and β anomers are defined specifically by the orientation of the hydroxyl group on the newly formed chiral center, the anomeric carbon (C-1 in aldoses), relative to the ring.

📖 Additional Information

  • C-1
  • C-2
  • C-4
  • C-6

The D/L designation is fixed by the configuration of the highest-numbered chiral center (C-5 in hexoses). The α and β anomers are defined specifically by the orientation of the hydroxyl group on the newly formed chiral center, the anomeric carbon (C-1 in aldoses), relative to the ring.

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