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Factors affecting the effciency of end-labelling by DNA kinase

Hiranya Roychowdhury hroychow at NMSU.EDU
Mon Oct 21 17:59:39 EST 1996

At 04:44 PM 10/21/96 GMT, Dominic Voon wrote:
>Hi all,
>	I am going to start labelling some PCR products using DNA kinase
>(with alpha-32P dCTP) and it is quite important that I get high
>effeciency. I am just wondering if anyone could just give me a quick
>run-down on the critical factors that contribute to the effeciency of this
>experiment ? such as DNA concentration, dCTP concentration etc. Any
>pointer/comment/suggestion/advice will be much appreciated. Please email
>me directly at dvoon at cyllene.uwa.edu.au.
>many thanks in advance,

I am not sure you know what you are doing! Kinase will transfer the cold
gamma-phosphate group from the dCTP. You sould use gamma-32P-ATP; that's
what I  ( and I believe, most) do. There is really nothing else that could
go wrong if you follow a standard rxn protocol.
Dr. Hiranya Sankar Roychowdhury
Plant Genetic Engineering Lab.
New Mexico State University
Las Cruces, NM 88003
Ph. (505) 646-5785
hroychow at nmsu.edu

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