| gptkbp:instanceOf | gptkb:transcription_factor gptkb:protein
 
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                                | gptkbp:binds | operator region of lac operon 
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                                | gptkbp:category | gptkb:repressor_protein operon model
 transcriptional regulation
 bacterial proteins
 prokaryotic gene regulation
 
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                                | gptkbp:decommissioned | allolactose IPTG
 
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                                | gptkbp:discoveredBy | gptkb:François_Jacob gptkb:Jacques_Monod
 
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                                | gptkbp:discoveredIn | 1961 
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                                | gptkbp:domain | DNA-binding domain core domain
 tetramerization domain
 
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                                | gptkbp:encodedBy | gptkb:lacI_gene 
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                                | gptkbp:foundIn | gptkb:Bacteria 
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                                | gptkbp:function | prevents transcription in absence of lactose 
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                                | gptkbp:inhibitedBy | lactose allolactose
 transcription of lac operon
 IPTG
 
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                                | gptkbp:locatedOnChromosome | upstream of lac operon 
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                                | gptkbp:mechanismOfAction | negative regulation 
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                                | gptkbp:molecularWeight | 154 kDa 
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                                | gptkbp:organism | gptkb:Bacteria 
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                                | gptkbp:PDB | gptkb:1LBI 
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                                | gptkbp:regulates | gptkb:lac_operon gptkb:lacY_gene
 lacZ gene
 lacA gene
 
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                                | gptkbp:response | allolactose 
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                                | gptkbp:structure | tetramer 
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                                | gptkbp:usedIn | molecular biology research gene expression studies
 inducible expression systems
 
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                                | gptkbp:bfsParent | gptkb:lacI 
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                                | gptkbp:bfsLayer | 7 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Lac repressor 
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