DNA Solution - Some Queries

Dr. Hiranya S. Roychowdhury via methods%40net.bio.net (by hroychow from nmsu.edu)
Tue May 13 13:24:26 EST 2008

Hmmm ....
In my experience, the molarity is fairly accurate, and certainly is not
generally afactor for routine use of the oligos.

Now, if one has to ask the next two questions, wouldn't it be better that
the downstream apllications are also left up to some commercial outfit? 
Should any in the lab have to ask these questions, such a lab is in a
rather bad shape!

> Hello. I hope you can help me to solve some of the problems below.
> 1) We purchase the synthetic oligonucleotides and they claim to have
> 100uM of DNA. Is this number reliable for each and every batch?
> 2) If what is claimed by the oligo supplier is not really correct,
> usually what is the method you used to prepare certain concentration
> of DNA solution (say 10uM)?
> 3) How to use UV-vis to check the concentration of a DNA solution and
> how to calculate the amount of DNA present in the solution? If
> possible, any books or references that you can recommend?
> Thank you very much for you time.
> lsl
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Hiranya S. Roychowdhury, Ph.D.
Asst. Professor,
Health & Public Services
Dona Ana Community College
New Mexico State University
Las Cruces, NM 88003

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