Poly-A sequences lay upstream of a reporter gene?
Posted 23 March 2005 - 06:34 AM
Posted 24 March 2005 - 07:56 AM
justwonder, on Mar 23 2005, 01:37 PM, said:
This is how the poly A sequence looks like. It lays upstream the SV40 promoter and is "used as transcriptional pause and for background reduction". What does it mean with that? Thanks.
Edited by justwonder, 24 March 2005 - 07:58 AM.
Posted 24 March 2005 - 11:57 AM
Like I said, it's just conjecture on my part.
Edited by george@CASE, 24 March 2005 - 11:59 AM.
Posted 24 March 2005 - 01:04 PM
The synthetic poly(A) signal in the pCAT3 vector and several other Promega vectors is placed upstream of the reporter to eliminate background and vector dependent reporter signal. Basically, all vectors have cryptic transcription factor binding sites that will cause the reporter to be transcribed. By putting in a polyadenylation signal, these transcripts should no longer contain the reporter gene because it is spliced off and will not cause artificial signal. I hope this is clear. If you have any additional questions, please feel free to contact me at firstname.lastname@example.org.
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