H. 3 C's H- он CHOH D-glyceraldehyde H. H- OH но 4 C's OH -он ČH2OH D-erythrose ČHOH D-threose H. H. H. H- OH но H- но 5 c's O- H- но но H. H- -OH H- -O- H- он H. OH CH;OH ČH2OH CH2OH CH2OH D-ribose D-arabinose D-хylose D-lyxose H. H. H. H. H. H. H. H. OH но H Он но -- OH HO ОН НО 6 C's H H- OH HO HO H OH H- OH HO но H- OH H- -OH H- HO- H- OH HO H- но но но H. OH H- OH он H- OH H- OH -OH OH H- OH CHŁOH ČH-OH ČH2OH ČH2OH ČHHOH CH2OH ČH-OH ČH2OH D-allose D-altrose D-glucose D-mannose D-gulose D-idose D-galactose D-talose
Organic Chemistry of Metabolic Pathways
Metabolic pathways allude to the arrangement of chemical catalyzed reactions that lead to the transformation of a substance into the final product. Metabolic pathways incorporate a progression of reaction where the substrate is changed continuously and the transitional metabolites are persistently recovered.
Glucogenesis
Glucogenesis is a metabolic pathway in which glucose is produced from carbon substrates that are not carbohydrates. This process is observed in plants, animals, fungi, bacteria and other micro organisms. The general definition for glucogenesis or gluconeogenesis is as follows,
Draw two possible epimers of D-erythrose. Name each of these compounds using Figure 28.4.
Figure 28.4: The family of D-aldoses having three to six carbon atoms
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