Lac 1 - Mountain_Bike_Trails_Near

Lac 1 - Mountain_Bike_Trails_Near

5131 Miles of you

The lac operon (lactose operon) is an operon required for the transport and metabolism of lactose in Escherichia coli and many other enteric bacteria. Although glucose is the preferred carbon source for most bacteria, the lac operon allows for the effective digestion of lactose when glucose is not available. Gene regulation of the lac operon was the first genetic regulatory mechanism to be understood clearly, so it has become a foremost example of prokaryotic gene regulation. It is often discussed in introductory molecular and cellular biology classes for this reason. Bacterial operons are polycistronic transcripts that are able to produce multiple proteins from one mRNA transcript. In this case, when lactose is required as a sugar source for the bacterium, the three genes of the lac operon can be expressed and their subsequent proteins translated: lacZ, lacY, and lacA. The gene product of lacZ is β-galactosidase which cleaves lactose, a disaccharide, into glucose and galactose. lacY encodes lactose permease, a protein which becomes embedded in the cytoplasmic membrane to enable transport of lactose into the cell. Finally, lacA encodes galactoside O-acetyltransferase. It would be wasteful to produce the enzymes when there is no lactose available or if there is a more preferable energy source available, such as glucose. The lac operon uses a two-part control mechanism to ensure that the cell expends energy producing the enzymes encoded by the lac operon only when necessary. In the absence of lactose, the lac repressor halts production of the enzymes encoded by the lac operon. In the presence of glucose, the catabolite activator protein (CAP), required for production of the enzymes, remains inactive, and EIIAGlc shuts down lactose permease to prevent transport of lactose into the cell. This dual control mechanism causes the sequential utilization of glucose and lactose in two distinct growth phases, known as diauxie.

Trail name
Awesome destination
Est.time
2 hours 45 minutes
Distance
2.5 km
Main destination
Additional destination

Be the first one who uploadthe trail map

You can contribute to your community.Upload it! :-)

Upload

Photos


Inspire your team

Our team works hard to offer you the best possible experience and the perfect website. If you have ideas, sugestions or comments, we will be pleased to read you.



Picture Upload

You can upload your photos.


Upload picture

Drop files here or click to upload

report an error

You see an error. You can help us update the information.

Please indicate clearly the incorrect information and the correction needed.


Please give clear detail