D and L Series of Sugars CHOH CH,OH CHO CHO CHO CHO C=0 0=C H 一OH HO-H HO H -OH H -OH HO 一H HO- -H H -OH H-OH HO-H H-OH HO-H H-OH HO-H CH,OH CHOH CH,OH CHOH CHOH CH,OH D-threose L-threose D-ribulose L-ribulose D-xylose L-xylose Sugars of the D series have the OH group of the bottom asymmetric carbon on the right in the Fischer projection. Sugars of the L series,in contrast,have the OH group of the bottom asymmetric carbon on the left. Chapter 23 7 Chapter 23 7 D and L Series of Sugars ▪ Sugars of the D series have the OH group of the bottom asymmetric carbon on the right in the Fischer projection. ▪ Sugars of the L series, in contrast, have the OH group of the bottom asymmetric carbon on the left