00:01
So in order to understand what occurs during the regulation of the lac operon, whether cyclic amp levels increase or decrease or whether transcription is promoted or inhibited, it is important to understand the function of the lackophoron.
00:16
So the lactose operon, or rather the lack -operon, is an inducible system that contains the gene for lactase or sugar found in milk.
00:25
So what exactly does this mean? it means that the genes located within the lack -operon, right here, the capside -prite -promed, operator lack z, lack y, and lack a, essentially metabolize lactose into energy.
00:39
The only issue here is that it is more energetically expensive to digest lactose than it is to digest glucose, which is a simpler sugar as an energy source.
00:48
Therefore, it is only practical to use this option when lactose is high and glucose is slow.
00:55
So with that said, one can deduce that when lactose is present and glucose is absent, as in this situation, the lack operon is induced.
01:05
So now that we understand how the lack operon functions, how does this relate to cyclic amp? so generally speaking, the lack operon is assisted by the catabolite activated protein right here, which is a transcriptional activator when glucose levels fall.
01:26
So with decreasing amounts of glucose, there is an increase in cyclic amp, which is a signaling molecule...