TrP ATTENUATION

Molecular Biology Laboratory
Agricultural Genetics Institute
Vien Di truyen Nong Nghiep
Tuliem, Hanoi
VIETNAM

Category:

Howto & Style

Tags:

• TrP
• ATTENUATION

[thegreatman99]

Something the video isn't to clear about which you should remember is that the 3-4 stem loop forms only if trp is present. This prevents transcription from occurring. If there's no trp at all, the 2-3 stem loop occurs instead and so the 3-4 stem loop can't form since the 3 is already occupied. This allows transcription to occur as the 2-3 stem loop doesn't block transcription....only the 3-4 does.

Nevertheless the video helped me, thanks!

[RamirezHD]

not recommended needs much more detail...

[sssk38]

WRONG VIDEO

copying from laserindividual: The video shows attenuation and talks about repression.

[laserindividual]

The animation shows attenuation, whilst the narrator speaks of repression, and so the video is misnamed and should be flagged for inaccuracy.

[richdar99]

can u help me with explaining the operation of the trp operon and why is it considered a repressible operon

[karlkarlkarl1234]

This is not attenuation it is repression.

[Roseurbane]

@xEternalx thegreatman99 got it right. LeeDiddy990 mixed up the concentration of tryptophan. Low concentration forms the 2-3 loop (trasncription continues, more tryptophan produced) while high forms the 3-4 loop (stops transcription, no more tryptophan is produced).

Hope this helps! :)

[agathman]

Pretty diagram of attenuation, but the voice-over doesn't match what's happening.  There's no explanation of attenuation at all.

[Hkanbar15]

Please change the title, its just not appropriate

[M4KS1M]

no real explanation of the attenuation, just the repressor-polymerase dynamics :(

[farajvip]

how about the attenuator ????