Malate dehydrogenase (MDH) and glucose 6-phosphate dehydrogenase (G6PDH) have been partially purified from preparations of homogenized yeast cells using Procion Yellow H-E3G and Procion Red H-E7B, respectively, immobilized on solid perfluoropolymer supports in an expanded bed. A series of pilot experiments were carried out in small packed beds using clarified homogenate to determine the optimal elution conditions for both MDH and G6PDH. Selective elution of MDH using NADH was effective but the yields obtained were dependent on the concentration of NADH used. Selective elution was found to be most effective when a low concentration of NaCl (0.1 M) was present. MDH could be recovered in 84% yield with a purification factor of 94 when this strategy was adopted. In the case of G6PDH, specific elution using NADP(+) was successful in purifying G6PDH 178-fold in 96% yield. The dynamic capacity of both affinity supports was estimated by frontal analysis, in an expanded bed with unclarified homogenate, and corresponded to 17 U MDH/mL of settled Procion Yellow H-E3G perfluoropolymer support and 7.7 U H6PDH/mL of settled Procion Red H-E7B perfluoropolymer support. Expanded bed affinity chromatography of MDH resulted in an eluted fraction containing 89% of the applied activity with a purification factor of 113. Expanded bed affinity chromatography of G6PDH resulted in an eluted fraction containing 84% of the applied activity with a purification factor of 172. With both enzymes, the overall recovery of enzyme activity was greater than 94%, showing that the expanded bed approach to purification was nondenaturing.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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