| Reactions and Genes |  D-Xylose (C) | 
  |  remove | 
 D-arabinitol 4-dehydrogenase: D-arabinitol + NAD+→D-xylulose + NADH + H+  (EC 1.1.1.11) | 
 | No genes | 
 Arabinose isomerase: D-arabinopyranose→D-ribulose  (EC 5.3.1.3) | 
 | No genes | 
 | β-L-lyxopyranose→L-xylulose   | 
 | No genes | 
 Ribitol 2-dehydrogenase: ribitol + NAD+→D-ribulose + NADH + H+  (EC 1.1.1.56) | 
 | No genes | 
 | D-xylopyranose + NAD(P)+→D-xylono-1,5-lactone + NAD(P)H + H+  (EC 1.1.1.359) | 
 | No genes | 
 | D-arabinopyranose→D-arabinofuranose (spontaneous)  | 
 | No genes | 
 | L-arabinofuranose→L-arabinopyranose (spontaneous)  | 
 | No genes | 
 | D-xylopyranose + NADP+→D-xylono-1,4-lactone + NADPH + H+  (EC 1.1.1.424) | 
 | No genes | 
 Aldehyde reductase (in reverse): L-arabinose + NADPH + H+→L-arabinitol + NADP+  (EC 1.1.1.21) | 
 | No genes | 
 | D-xylose + NADPH + H+→xylitol + NADP+  (EC 1.1.1.431) | 
 | No genes | 
 Xylose isomerase: α-D-xylopyranose→α-D-xylulofuranose  (EC 5.3.1.5) | 
 | Echvi_1876 |  -4.1 | 
 L-arabinose isomerase: β-L-arabinopyranose→L-ribulose  (EC 5.3.1.4) | 
 | Echvi_1879 |  +0.0 | 
 D-ribulokinase: D-ribulose + ATP→D-ribulose 5-phosphate + ADP + H+  (EC 2.7.1.47) | 
 | Echvi_0515 |  -0.1 | 
 | Echvi_4514 |  -0.0 | 
 L-fuculokinase: D-ribulose + ATP→D-ribulose 1-phosphate + ADP + H+  (EC 2.7.1.51) | 
 | No genes | 
 L-arabinitol 4-dehydrogenase: L-arabinitol + NAD+→L-xylulose + NADH + H+  (EC 1.1.1.12) | 
 | No genes | 
 | D-xylono-1,5-lactone + H2O→D-xylonate + H+  (EC 3.1.1.110) | 
 | No genes | 
 Xylono-1,4-lactonase: D-xylono-1,4-lactone + H2O→D-xylonate + H+  (EC 3.1.1.68) | 
 | No genes | 
 | α-L-arabinopyranose + NAD(P)+→L-arabinono-1,4-lactone + NAD(P)H + H+  (EC 1.1.1.376) | 
 | No genes | 
 | D-arabinofuranose + NADP+→D-arabinono-1,4-lactone + NADPH + H+  (EC 1.1.1.427) | 
 | No genes | 
 D-arabinonolactonase: D-arabinono-1,4-lactone + H2O→D-arabinonate + H+  (EC 3.1.1.30) | 
 | No genes | 
 L-fuculose-phosphate aldolase: D-ribulose 1-phosphate→glycerone phosphate + glycolaldehyde  (EC 4.1.2.17) | 
 | No genes | 
 L-arabinonolactonase: L-arabinono-1,4-lactone + H2O→L-arabinonate + H+  (EC 3.1.1.15) | 
 | No genes | 
 L-xylulose reductase (in reverse): L-xylulose + NADPH + H+→xylitol + NADP+  (EC 1.1.1.10) | 
 | No genes | 
 L-xylulokinase: L-xylulose + ATP→L-xylulose 5-phosphate + ADP + H+  (EC 2.7.1.53) | 
 | No genes | 
 Ribulokinase: L-ribulose + ATP→L-ribulose 5-phosphate + ADP + H+  (EC 2.7.1.16) | 
 | Echvi_0515 |  -0.1 | 
 | Echvi_4514 |  -0.0 | 
 Xylonate dehydratase: D-xylonate→2-dehydro-3-deoxy-D-pentonate + H2O  (EC 4.2.1.82) | 
 | No genes | 
 2-dehydro-3-deoxy-D-pentonate aldolase: 2-dehydro-3-deoxy-D-pentonate→glycolaldehyde + pyruvate  (EC 4.1.2.28) | 
 | No genes | 
 Arabinonate dehydratase: D-arabinonate→2-dehydro-3-deoxy-D-pentonate + H2O  (EC 4.2.1.5) | 
 | No genes | 
 D-xylulose reductase: xylitol + NAD+→D-xylulose + NADH + H+  (EC 1.1.1.9) | 
 | No genes | 
 L-arabinonate dehydratase: L-arabinonate→2-dehydro-3-deoxy-L-pentonate + H2O  (EC 4.2.1.25) | 
 | No genes | 
 L-ribulose-5-phosphate 3-epimerase (in reverse): L-xylulose 5-phosphate→L-ribulose 5-phosphate  (EC 5.1.3.22) | 
 | No genes | 
 2-dehydro-3-deoxy-L-pentonate aldolase: 2-dehydro-3-deoxy-L-pentonate→glycolaldehyde + pyruvate  (EC 4.1.2.18) | 
 | No genes | 
 2-dehydro-3-deoxy-L-arabinonate dehydratase: 2-dehydro-3-deoxy-L-pentonate→2,5-dioxopentanoate + H2O  (EC 4.2.1.43) | 
 | No genes | 
 L-ribulose-5-phosphate 4-epimerase: L-ribulose 5-phosphate→D-xylulose 5-phosphate  (EC 5.1.3.4) | 
 | Echvi_0503 |  +0.1 | 
 | 2-dehydro-3-deoxy-D-pentonate→2,5-dioxopentanoate + H2O  (EC 4.2.1.141) | 
 | No genes | 
 Xylulokinase: D-xylulose + ATP→D-xylulose 5-phosphate + ADP + H+  (EC 2.7.1.17) | 
 | Echvi_1875 |  -3.7 | 
 2,5-dioxovalerate dehydrogenase: 2,5-dioxopentanoate + NADP+ + H2O→2-oxoglutarate + NADPH + 2 H+  (EC 1.2.1.26) | 
 | Echvi_3952 |  -0.1 | 
 Glycolaldehyde dehydrogenase: glycolaldehyde + NAD+ + H2O→glycolate + NADH + 2 H+  (EC 1.2.1.21) | 
 | Echvi_0481 |  -0.3 | 
 | Echvi_1497 |  -0.1 | 
 | Echvi_1684 |  -0.1 | 
 | glycolaldehyde + an oxidized electron carrier→glycolate + a reduced two electron carrier + H+   | 
 | No genes | 
 2,5-dioxovalerate dehydrogenase: 2,5-dioxopentanoate + NAD(P)+ + H2O→2-oxoglutarate + NAD(P)H + 2 H+  (EC 1.2.1.26) | 
 | Echvi_3952 |  -0.1 | 
 Glyoxylate reductase: glycolate + NAD+→glyoxylate + NADH + H+  (EC 1.1.1.26) | 
 | No genes | 
 Malate synthase: glyoxylate + acetyl-CoA + H2O→(S)-malate + coenzyme A + H+  (EC 2.3.3.9) | 
 | No genes | 
Links:
Candidate genes for each reaction are identified from best hits to MetaCyc; by matching EC numbers (which are assigned by TIGRFam, SEED, or best hits to KEGG); or by matching SEED roles to KEGG reactions to MetaCyc reactions. See the "Protein" tab of each gene for more information