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6022 PubChem-compound 7722-84-1 CAS Phosphocarrier protein HPr predicted L-xylulose 5-phosphate 3-epimerase L-xylulose -5-phosphate 937 ChemSpider 1.0 Dehydroascorbic acid ReactionCoupledTransportCatalysis170 ACTIVATION NADH HMDB0003125 HMDB SMILES OCC(=O)[C@@H](O)[C@H](O)COP(O)(O)=O 6.0 439153 PubChem-compound SMILES O SMILES OO HMDB0006511 HMDB C6H8O6 Ascorbic acid 176.03209 1.0 dehydroascorbate (bicyclic form) L-ribulose 5-phosphate L-xylulose -5-phosphate 3-keto-L-gulonate 6-phosphate HMDB0000538 HMDB NAD 439273 PubChem-compound ATP BioCyc C6H6O9P L-ascorbate 6-phosphate 252.9766 CHEBI:16142 ChEBI CHEBI:58226 ChEBI L-ribulose-5-phosphate 4-epimerase sgbE 3-keto-L-gulonate-6-phosphate decarboxylase sgbH Probable L-ascorbate-6-phosphate lactonase ulaG L-xylulose/3-keto-L-gulonate kinase 1.0 3445-22-5 CAS 2,3-diketo-L-gulonate reductase CHEBI:15846 ChEBI ADP BioCyc 1.1.1.130 false 1.1.1.130 2,3-Diketo-L-gulonate + Hydrogen Ion + NADH → 3-Dehydro-L-gulonate + NAD LEFT_TO_RIGHT 3.1.1.- false 3.1.1.- L-ascorbate 6-phosphate + Water → 3-keto-L-gulonate 6-phosphate LEFT_TO_RIGHT 2.7.1.- false 2.7.1.- 3-Dehydro-L-gulonate + Adenosine triphosphate → 3-keto-L-gulonate 6-phosphate + Adenosine diphosphate + Hydrogen Ion LEFT_TO_RIGHT C6H9O10P 3-keto-L-gulonate 6-phosphate 271.99445 P0AA04 UniProt C6H6O6 dehydroascorbate (bicyclic form) 174.01643 C5H9O8P L-ribulose 5-phosphate 228.00461 C7H13O6P L-xylulose -5-phosphate 224.04607 1.0 5742 ChemSpider 1038 PubChem-compound SMILES OC[C@H](O)[C@@H](O)C(=O)[C@H](O)C(O)=O 388330 ChemSpider Ascorbic acid 10189562 ChemSpider GO:0005829 GENE ONTOLOGY 274 ChemSpider CHEBI:16908 ChEBI Ascorbate-specific phosphotransferase enzyme IIB component CHEBI:16240 ChEBI 1010 ChemSpider GO:0070258 GENE ONTOLOGY ReactionCatalysis2689 ACTIVATION 3-keto-L-gulonate-6-phosphate decarboxylase ulaD CHEBI:57829 ChEBI Reaction2709 false 3-keto-L-gulonate 6-phosphate + Hydrogen Ion → Carbon dioxide + L-xylulose -5-phosphate LEFT_TO_RIGHT 5.1.3.4 false 5.1.3.4 L-ribulose 5-phosphate → Xylulose 5-phosphate LEFT_TO_RIGHT Hydrogen Ion CHEBI:58774 ChEBI C00231 KEGG Compound 1.0 Cytosol Adenosine triphosphate 58-68-4 CAS Reaction2702 true 2 Ascorbic acid + Hydrogen Ion + Hydrogen peroxide → Ascorbic acid + Dehydroascorbic acid + 2 Water LEFT_TO_RIGHT 124-38-9 CAS Reaction2700 true dehydroascorbate (bicyclic form) → 2,3-Diketo-L-gulonate + Hydrogen Ion LEFT_TO_RIGHT Reaction2701 true Dehydroascorbic acid + Water → dehydroascorbate (bicyclic form) LEFT_TO_RIGHT PW000893 PathWhiz C00008 KEGG Compound C04575 KEGG Compound Pentose Phosphate SubPathway C00001 KEGG Compound 50-81-7 CAS 439190 PubChem-compound C00004 KEGG Compound C00003 KEGG Compound Inner Membrane C00002 KEGG Compound Phosphocarrier protein HPr Probable L-ascorbate-6-phosphate lactonase ulaG 182283 ChemSpider CHEBI:15622 ChEBI C21H28N7O14P2 NAD 664.11694 1.0 Ascorbate-specific phosphotransferase enzyme IIB component Ascorbate-specific phosphotransferase enzyme IIA component L-ascorbate 6-phosphate C00011 KEGG Compound SMILES O=C=O HMDB0000902 HMDB 2,3-diketo-l-gulonate BioCyc CHEBI:17242 ChEBI C21H29N7O14P2 NADH 665.12476 2.0 2.7.1.- false 2.7.1.- Ascorbic acid + HPr - phosphorylated → HPr + L-ascorbate 6-phosphate LEFT_TO_RIGHT 5957 PubChem-compound HMDB0006334 HMDB 562 TAXONOMY 60802-29-1 CAS H Hydrogen Ion 1.007825 C6H6O6 Dehydroascorbic acid 174.01643 Ascorbate Metabolism 56-65-5 CAS 53-84-9 CAS C00027 KEGG Compound Ascorbate-specific permease IIC component ulaA Adenosine diphosphate C10H15N5O10P2 Adenosine diphosphate 427.02942 SMILES OC[C@H](O)C(O)C(=O)C(=O)C(O)=O 4.1.1.85 false 4.1.1.85 3-keto-L-gulonate 6-phosphate + Hydrogen Ion → Carbon dioxide + L-xylulose -5-phosphate LEFT_TO_RIGHT 54670067 PubChem-compound 5.1.3.4 false 5.1.3.4 L-ribulose 5-phosphate → Xylulose 5-phosphate LEFT_TO_RIGHT L-ribulose-5-phosphate 3-epimerase ulaE Reaction2710 false L-xylulose -5-phosphate → L-ribulose 5-phosphate LEFT_TO_RIGHT SMILES OCC(=O)[C@@H](O)[C@@H](O)COP([O-])([O-])=O SMILES OCC(O)C1OC(=O)C(=O)C1=O 1.0 SMILES OC(COP([O-])([O-])=O)C(O)C(=O)C(O)C(O)=O 1.0 SMILES CC(COP([O-])([O-])=O)C(C)C(=O)CO L-ribulose-5-phosphate 4-epimerase ulaF L-ribulose-5-phosphate 3-epimerase ulaE 3-keto-L-gulonate-6-phosphate decarboxylase ulaD SMILES NC(=O)C1=C[N+](=CC=C1)[C@@H]1O[C@H](COP(O)(=O)OP(O)(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)N2C=NC3=C2N=CN=C3N)[C@@H](O)[C@H]1O C6H10O7 3-Dehydro-L-gulonate 194.04265 L-ascorbate 6-phosphate 5682 ChemSpider SMILES NC(=O)C1=CN(C=CC1)[C@@H]1O[C@H](CO[P@](O)(=O)O[P@](O)(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)N2C=NC3=C(N)N=CN=C23)[C@@H](O)[C@H]1O Xylulose 5-phosphate Water Hydrogen peroxide HYDROGEN-PEROXIDE BioCyc SubPathwayInteraction93024 SubPathwayReaction SubPathway93024Reaction 210328 PubChem-compound CHEBI:61698 ChEBI HMDB0001341 HMDB SMP0000814 SMPDB L-ribulose-5-phosphate 4-epimerase ulaF 388406 ChemSpider 2.0 1.0 SMILES [H][C@@]1(OC(=O)C(=O)C1=O)[C@H](O)CO SMILES NC1=NC=NC2=C1N=CN2[C@@H]1O[C@H](COP(O)(=O)OP(O)(O)=O)[C@@H](O)[C@H]1O L-xylulose kinase 763 ChemSpider L-ascorbate 6-phosphate lactonase ReactionCatalysis2703 ACTIVATION ReactionCatalysis2702 ACTIVATION 1.0 2,3-diketo-L-gulonate reductase 2.0 784 PubChem-compound CHEBI:15422 ChEBI C00618 KEGG Compound 53477844 PubChem-compound 1.0 1.0 Escherichia coli 7732-18-5 CAS 388299 ChemSpider HMDB0001487 HMDB 23615403 PubChem-compound SMILES [H][C@@]1(OC(=O)C(O)=C1O)[C@@H](O)CO 1.0 PW000793 PathWhiz C10H16N5O13P3 Adenosine triphosphate 506.99576 ReactionCatalysis6087 ACTIVATION P39306 UniProt CHEBI:16526 ChEBI P39305 UniProt 3-Dehydro-L-gulonate predicted L-xylulose 5-phosphate 3-epimerase 1.0 1.0 CHEBI:16761 ChEBI 1.0 1.0 C00072 KEGG Compound P39304 UniProt P39301 UniProt P39300 UniProt HMDB0000044 HMDB 962 PubChem-compound P37679 UniProt P37677 UniProt 5800 ChemSpider P37678 UniProt CO2 Carbon dioxide 43.98983 5893 PubChem-compound CHEBI:16332 ChEBI ReactionCatalysis2699 ACTIVATION C00080 KEGG Compound ReactionCatalysis2698 ACTIVATION ReactionCatalysis2691 ACTIVATION ReactionCatalysis2690 ACTIVATION HMDB0002111 HMDB P37672 UniProt HMDB0001264 HMDB ReactionCatalysis2696 ACTIVATION CHEBI:15377 ChEBI CHEBI:15378 ChEBI SMILES [H+] Xylulose 5-phosphate SubPathwayInput Ascorbic acid 58-64-0 CAS SMILES NC1=NC=NC2=C1N=CN2[C@@H]1O[C@H](COP(O)(=O)OP(O)(=O)OP(O)(O)=O)[C@@H](O)[C@H]1O P69820 UniProt 2,3-Diketo-L-gulonate Ascorbate-specific permease IIC component ulaA 1.0 L-ribulose-5-phosphate 4-epimerase sgbE P69822 UniProt C6H8O7 2,3-Diketo-L-gulonate 192.02701 L-DEHYDRO-ASCORBATE BioCyc 490-83-5 CAS 280 PubChem-compound L-xylulose/3-keto-L-gulonate kinase 3-keto-L-gulonate-6-phosphate decarboxylase sgbH 2,3-diketo-L-gulonate reductase L-ascorbate PTS permease CHEBI:29073 ChEBI HMDB0000868 HMDB 1.0 XYLULOSE-5-PHOSPHATE BioCyc 1.0 H2O Water 18.010565 H2O2 Hydrogen peroxide 34.005478 1.0 L-ribulose 5-phosphate NADH BioCyc C5H11O8P Xylulose 5-phosphate 230.01915 Reaction6126 false L-xylulose -5-phosphate → L-ribulose 5-phosphate LEFT_TO_RIGHT NAD BioCyc C00425 KEGG Compound SMP0000912 SMPDB HMDB0059597 HMDB SMILES [H][C@@]1(OC(=O)C(O)=C1[O-])[C@@H](O)COP([O-])([O-])=O Carbon dioxide 1.0 HMDB0001967 HMDB ASCORBATE BioCyc 2.0 1.0 Ascorbate-specific phosphotransferase enzyme IIA component P37680 UniProt 1.0 Probable L-ascorbate- 6-phosphate lactonase ulaG L-xylulose/3- keto-L- gulonate kinase 2,3-diketo-L- gulonate reductase 3-keto-L- gulonate-6- phosphate decarboxylase ulaD 3-keto-L- gulonate-6- phosphate decarboxylase sgbH L-ribulose-5- phosphate 4-epimerase sgbE L-ribulose-5- phosphate 3-epimerase ulaE L-ribulose-5- phosphate 4-epimerase ulaF predicted L-xylulose 5-phosphate 3-epimerase Phosphocarrier protein HPr Phosphocarrier protein HPr Ascorbate- specific phosphotransferase enzyme IIA component Ascorbate- specific phosphotransferase enzyme IIB component Ascorbate- specific permease IIC component ulaA Xylulose 5-phosphate Xylulose 5-phosphate L-ascorbate 6-phosphate H 2 O 3-keto-L- gulonate 6-phosphate 3-Dehydro-L- gulonate ATP ADP H + 2,3-Diketo-L- gulonate NADH H + NAD dehydroascorbate (bicyclic form) H + Dehydroascorbic acid H 2 O H 2 O 2 H + Ascorbic acid Ascorbic acid H 2 O H + L-xylulose -5-phosphate CO 2 H + CO 2 L-xylulose -5-phosphate L-ribulose 5-phosphate L-ribulose 5-phosphate Ascorbic acid Pentose Phosphate Pentose Phosphate ANAEROBIC AEROBIC
6022 PubChem-compound 7722-84-1 CAS Phosphocarrier protein HPr predicted L-xylulose 5-phosphate 3-epimerase L-xylulose -5-phosphate 937 ChemSpider 1.0 Dehydroascorbic acid ReactionCoupledTransportCatalysis170 ACTIVATION NADH HMDB0003125 HMDB SMILES OCC(=O)[C@@H](O)[C@H](O)COP(O)(O)=O 6.0 439153 PubChem-compound SMILES O SMILES OO HMDB0006511 HMDB C6H8O6 Ascorbic acid 176.03209 1.0 dehydroascorbate (bicyclic form) L-ribulose 5-phosphate L-xylulose -5-phosphate 3-keto-L-gulonate 6-phosphate HMDB0000538 HMDB NAD 439273 PubChem-compound ATP BioCyc C6H6O9P L-ascorbate 6-phosphate 252.9766 CHEBI:16142 ChEBI CHEBI:58226 ChEBI L-ribulose-5-phosphate 4-epimerase sgbE 3-keto-L-gulonate-6-phosphate decarboxylase sgbH Probable L-ascorbate-6-phosphate lactonase ulaG L-xylulose/3-keto-L-gulonate kinase 1.0 3445-22-5 CAS 2,3-diketo-L-gulonate reductase CHEBI:15846 ChEBI ADP BioCyc 1.1.1.130 false 1.1.1.130 2,3-Diketo-L-gulonate + Hydrogen Ion + NADH → 3-Dehydro-L-gulonate + NAD LEFT_TO_RIGHT 3.1.1.- false 3.1.1.- L-ascorbate 6-phosphate + Water → 3-keto-L-gulonate 6-phosphate LEFT_TO_RIGHT 2.7.1.- false 2.7.1.- 3-Dehydro-L-gulonate + Adenosine triphosphate → 3-keto-L-gulonate 6-phosphate + Adenosine diphosphate + Hydrogen Ion LEFT_TO_RIGHT C6H9O10P 3-keto-L-gulonate 6-phosphate 271.99445 P0AA04 UniProt C6H6O6 dehydroascorbate (bicyclic form) 174.01643 C5H9O8P L-ribulose 5-phosphate 228.00461 C7H13O6P L-xylulose -5-phosphate 224.04607 1.0 5742 ChemSpider 1038 PubChem-compound SMILES OC[C@H](O)[C@@H](O)C(=O)[C@H](O)C(O)=O 388330 ChemSpider Ascorbic acid 10189562 ChemSpider GO:0005829 GENE ONTOLOGY 274 ChemSpider CHEBI:16908 ChEBI Ascorbate-specific phosphotransferase enzyme IIB component CHEBI:16240 ChEBI 1010 ChemSpider GO:0070258 GENE ONTOLOGY ReactionCatalysis2689 ACTIVATION 3-keto-L-gulonate-6-phosphate decarboxylase ulaD CHEBI:57829 ChEBI Reaction2709 false 3-keto-L-gulonate 6-phosphate + Hydrogen Ion → Carbon dioxide + L-xylulose -5-phosphate LEFT_TO_RIGHT 5.1.3.4 false 5.1.3.4 L-ribulose 5-phosphate → Xylulose 5-phosphate LEFT_TO_RIGHT Hydrogen Ion CHEBI:58774 ChEBI C00231 KEGG Compound 1.0 Cytosol Adenosine triphosphate 58-68-4 CAS Reaction2702 true 2 Ascorbic acid + Hydrogen Ion + Hydrogen peroxide → Ascorbic acid + Dehydroascorbic acid + 2 Water LEFT_TO_RIGHT 124-38-9 CAS Reaction2700 true dehydroascorbate (bicyclic form) → 2,3-Diketo-L-gulonate + Hydrogen Ion LEFT_TO_RIGHT Reaction2701 true Dehydroascorbic acid + Water → dehydroascorbate (bicyclic form) LEFT_TO_RIGHT PW000893 PathWhiz C00008 KEGG Compound C04575 KEGG Compound Pentose Phosphate SubPathway C00001 KEGG Compound 50-81-7 CAS 439190 PubChem-compound C00004 KEGG Compound C00003 KEGG Compound Inner Membrane C00002 KEGG Compound Phosphocarrier protein HPr Probable L-ascorbate-6-phosphate lactonase ulaG 182283 ChemSpider CHEBI:15622 ChEBI C21H28N7O14P2 NAD 664.11694 1.0 Ascorbate-specific phosphotransferase enzyme IIB component Ascorbate-specific phosphotransferase enzyme IIA component L-ascorbate 6-phosphate C00011 KEGG Compound SMILES O=C=O HMDB0000902 HMDB 2,3-diketo-l-gulonate BioCyc CHEBI:17242 ChEBI C21H29N7O14P2 NADH 665.12476 2.0 2.7.1.- false 2.7.1.- Ascorbic acid + HPr - phosphorylated → HPr + L-ascorbate 6-phosphate LEFT_TO_RIGHT 5957 PubChem-compound HMDB0006334 HMDB 562 TAXONOMY 60802-29-1 CAS H Hydrogen Ion 1.007825 C6H6O6 Dehydroascorbic acid 174.01643 Ascorbate Metabolism 56-65-5 CAS 53-84-9 CAS C00027 KEGG Compound Ascorbate-specific permease IIC component ulaA Adenosine diphosphate C10H15N5O10P2 Adenosine diphosphate 427.02942 SMILES OC[C@H](O)C(O)C(=O)C(=O)C(O)=O 4.1.1.85 false 4.1.1.85 3-keto-L-gulonate 6-phosphate + Hydrogen Ion → Carbon dioxide + L-xylulose -5-phosphate LEFT_TO_RIGHT 54670067 PubChem-compound 5.1.3.4 false 5.1.3.4 L-ribulose 5-phosphate → Xylulose 5-phosphate LEFT_TO_RIGHT L-ribulose-5-phosphate 3-epimerase ulaE Reaction2710 false L-xylulose -5-phosphate → L-ribulose 5-phosphate LEFT_TO_RIGHT SMILES OCC(=O)[C@@H](O)[C@@H](O)COP([O-])([O-])=O SMILES OCC(O)C1OC(=O)C(=O)C1=O 1.0 SMILES OC(COP([O-])([O-])=O)C(O)C(=O)C(O)C(O)=O 1.0 SMILES CC(COP([O-])([O-])=O)C(C)C(=O)CO L-ribulose-5-phosphate 4-epimerase ulaF L-ribulose-5-phosphate 3-epimerase ulaE 3-keto-L-gulonate-6-phosphate decarboxylase ulaD SMILES NC(=O)C1=C[N+](=CC=C1)[C@@H]1O[C@H](COP(O)(=O)OP(O)(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)N2C=NC3=C2N=CN=C3N)[C@@H](O)[C@H]1O C6H10O7 3-Dehydro-L-gulonate 194.04265 L-ascorbate 6-phosphate 5682 ChemSpider SMILES NC(=O)C1=CN(C=CC1)[C@@H]1O[C@H](CO[P@](O)(=O)O[P@](O)(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)N2C=NC3=C(N)N=CN=C23)[C@@H](O)[C@H]1O Xylulose 5-phosphate Water Hydrogen peroxide HYDROGEN-PEROXIDE BioCyc SubPathwayInteraction93024 SubPathwayReaction SubPathway93024Reaction 210328 PubChem-compound CHEBI:61698 ChEBI HMDB0001341 HMDB SMP0000814 SMPDB L-ribulose-5-phosphate 4-epimerase ulaF 388406 ChemSpider 2.0 1.0 SMILES [H][C@@]1(OC(=O)C(=O)C1=O)[C@H](O)CO SMILES NC1=NC=NC2=C1N=CN2[C@@H]1O[C@H](COP(O)(=O)OP(O)(O)=O)[C@@H](O)[C@H]1O L-xylulose kinase 763 ChemSpider L-ascorbate 6-phosphate lactonase ReactionCatalysis2703 ACTIVATION ReactionCatalysis2702 ACTIVATION 1.0 2,3-diketo-L-gulonate reductase 2.0 784 PubChem-compound CHEBI:15422 ChEBI C00618 KEGG Compound 53477844 PubChem-compound 1.0 1.0 Escherichia coli 7732-18-5 CAS 388299 ChemSpider HMDB0001487 HMDB 23615403 PubChem-compound SMILES [H][C@@]1(OC(=O)C(O)=C1O)[C@@H](O)CO 1.0 PW000793 PathWhiz C10H16N5O13P3 Adenosine triphosphate 506.99576 ReactionCatalysis6087 ACTIVATION P39306 UniProt CHEBI:16526 ChEBI P39305 UniProt 3-Dehydro-L-gulonate predicted L-xylulose 5-phosphate 3-epimerase 1.0 1.0 CHEBI:16761 ChEBI 1.0 1.0 C00072 KEGG Compound P39304 UniProt P39301 UniProt P39300 UniProt HMDB0000044 HMDB 962 PubChem-compound P37679 UniProt P37677 UniProt 5800 ChemSpider P37678 UniProt CO2 Carbon dioxide 43.98983 5893 PubChem-compound CHEBI:16332 ChEBI ReactionCatalysis2699 ACTIVATION C00080 KEGG Compound ReactionCatalysis2698 ACTIVATION ReactionCatalysis2691 ACTIVATION ReactionCatalysis2690 ACTIVATION HMDB0002111 HMDB P37672 UniProt HMDB0001264 HMDB ReactionCatalysis2696 ACTIVATION CHEBI:15377 ChEBI CHEBI:15378 ChEBI SMILES [H+] Xylulose 5-phosphate SubPathwayInput Ascorbic acid 58-64-0 CAS SMILES NC1=NC=NC2=C1N=CN2[C@@H]1O[C@H](COP(O)(=O)OP(O)(=O)OP(O)(O)=O)[C@@H](O)[C@H]1O P69820 UniProt 2,3-Diketo-L-gulonate Ascorbate-specific permease IIC component ulaA 1.0 L-ribulose-5-phosphate 4-epimerase sgbE P69822 UniProt C6H8O7 2,3-Diketo-L-gulonate 192.02701 L-DEHYDRO-ASCORBATE BioCyc 490-83-5 CAS 280 PubChem-compound L-xylulose/3-keto-L-gulonate kinase 3-keto-L-gulonate-6-phosphate decarboxylase sgbH 2,3-diketo-L-gulonate reductase L-ascorbate PTS permease CHEBI:29073 ChEBI HMDB0000868 HMDB 1.0 XYLULOSE-5-PHOSPHATE BioCyc 1.0 H2O Water 18.010565 H2O2 Hydrogen peroxide 34.005478 1.0 L-ribulose 5-phosphate NADH BioCyc C5H11O8P Xylulose 5-phosphate 230.01915 Reaction6126 false L-xylulose -5-phosphate → L-ribulose 5-phosphate LEFT_TO_RIGHT NAD BioCyc C00425 KEGG Compound SMP0000912 SMPDB HMDB0059597 HMDB SMILES [H][C@@]1(OC(=O)C(O)=C1[O-])[C@@H](O)COP([O-])([O-])=O Carbon dioxide 1.0 HMDB0001967 HMDB ASCORBATE BioCyc 2.0 1.0 Ascorbate-specific phosphotransferase enzyme IIA component P37680 UniProt 1.0 ulaG lyx dlgD ulaD sgbH sgbE ulaE ulaF yiaR ptsH ptsH ulaC ulaB ulaA Xylulose 5-phosphate Xylulose 5-phosphate L-ascorbate 6-phosphate Water 3-keto-L- gulonate 6-phosphate 3-Dehydro-L- gulonate Adenosine triphosphate Adenosine diphosphate Hydrogen Ion 2,3-Diketo-L- gulonate NADH Hydrogen Ion NAD dehydroascorbate (bicyclic form) Hydrogen Ion Dehydroascorbic acid Water Hydrogen peroxide Hydrogen Ion Ascorbic acid Ascorbic acid Water Hydrogen Ion L-xylulose -5-phosphate Carbon dioxide Hydrogen Ion Carbon dioxide L-xylulose -5-phosphate L-ribulose 5-phosphate L-ribulose 5-phosphate Ascorbic acid Pentose Phosphate Pentose Phosphate