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cross-linking DNA strands

SEGAL, DAVID JAY djs1539 at cc.utah.edu
Tue Aug 10 00:33:00 EST 1993

In article <01H1HWTXQLS28WWPEL at acs.wooster.edu>, wmorgan at ACS.WOOSTER.EDU (William R. Morgan) writes...
{>In reply to article <CB8sFI.Hy6 at news.cis.umn.edu>, djs1539 at cc.utah.edu (SEGAL,
{>The molecule you quest for is psoralen.  Psoralen is a very well characterized
{>intercalator which, upon UV (apx. 650nm) irradiation, forms mono- and 
{>di-adducts primarily with pyrimidine bases, in fact primarily thymidines.
{I think you mean apx. _250_ nm for UV irradiation; 650 nm is obviously in
{the visible light range.
{Bill Morgan

Yes, I stand humbly corrected.  Actually though, I ment to say 350 nm.  
The longer wavelength results in crosslinking, the shorter wavelengths
(250 nm, for example) reverse the crosslinks.
Thank you for noticing my blunder.

- Dave Segal

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