Cloned gene expression in recombinant Saccharomyces cerevisiae 20B-12 containing three different plasmids was compared in batch and fed-batch cultures. The plasmids pNA3, pNA7, and pNA9 contain the alpha-amylase gene under the control of SUC2, PGK, and GAL7 Promoters, respectively. The synthesis of alpha-amylase was therefore induced by low glucose concentration for the SUC2 and PGK promoters, and by galactose for GAL7 promoter. The specific cell growth rates were similar among cells harboring the three different plasmids; they decreased from 0.35 to 0.38 h(-1) during the cell growth phase to 0.03 to 0.06 h(-1) during the production phase. The secretory alpha-amylase activity of cells harboring plasmid pNA7 was 129 U/mL in fed-batch culture, which was 1.4 and 2 times as high as the activities of cells harboring plasmids pNA3 and pNA9, respectively. The secretion ratios (amount of extracellular alpha-amylase activity/amounts of total alpha-amylase activity) of cells harboring plasmids pNA3, pNA7, and pNA9 were 91.4%, 94.5%, and 95.3%, respectively.
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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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