Transcritional Start Site

Randy Haun rhaun at
Thu Dec 15 17:33:05 EST 1994

In article <3cpr80$s3j at> klingj at (klingj) writes:
>From: klingj at (klingj)
>Subject: Re: Transcritional Start Site
>Date: 15 Dec 1994 16:35:12 GMT
>In article <3ci858$hej at>, klingj at (klingj) says:
>>          I am interested in determining the transcriptional start site of a recently cloned
>> gene. What current methods are available..... Please E-mail me at klingj at 
>In a follow up to my first question, several people at VA Tech thought that one can
> use RACE-PCR to identify the transcription start site, but nobody had any info on it. 
>Is this a viable alternative. I'd also like to avoid isotopes if it is possible. Please let
> me know if anyone has had experience with this technique and if it can be used for
> this purpose. Thanks.
>                                                          Sincerely,
>                                                                               Jim Kling
>James Kling 
>Anaerobe Lab
>1400 Prices Fork Rd
>Blacksburg, VA 24061-0305
>(703) 231-5094

Traditional methods of mapping a transcription start (e.g., nuclease 
protection assays and/or primer extension) would be more convincing.
However, these methods are typically performed using radioactive probes.
5'-RACE may get you close to the 5' end of the mRNA, but it would be 
difficult to prove that your longest PCR product corresponds to the 
transcription start site rather than just a truncation without using one
of these other methods.

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