05-22-2003, 02:00 PM
ram
what is the importance of lac operon in absence of glucose? what exactly does it do?
what is the importance of lac operon in absence of glucose? what exactly does it do?
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biochem -
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05-27-2003, 09:34 AM
calici norwalk
some of you should really jump on kaplan... the lac operon is a system inherent to prokaryotes that allows them to ONLY express the genes for lactose metabolism if lacose is PRESENT. the important thing to be aware of is that if lactose is NOT present, the system shuts down and no genes responsible for lactose metabolism are expressed... lactose binds the repressor which prevents said protein form inhibiting the transcription of the X and Y genes. meanwhile, low glucose is associated with a high cAMP level which also stimulates the transcription of the lac genes...
06-04-2003, 08:12 AM
kim
so if i got it correct in absence of glucose the lactose is going to help protein syntesis ans in presence of glucose the lac operon is going to shut down. but what difference will it make if there was no glucose and no lactose operon.... does it mean the person will stop producing any protein and he will die or something?
06-04-2003, 03:26 PM
usch
lac operon system is not existing in human (only in prokaryotes). Kaplan's biochem note includes all these informaiton |
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