MIKE LAMB mikejonlamb at earthlink.net
Wed Jun 19 13:08:39 EST 1996

Here is one intron benefit: Cancer prevention aid.  Introns can take 
hits from chemical carcinogens. These hits might otherwise hit and 
mutate an exon causing more damage. The more introns there are, the 
fewer damaging mutations occur. 

Earlier in evolutionary history, viruses (now 'smarter') might have also 
been thwarted. I'm not claiming this affect is large but I strongly 
believe the affect is real. 

Junk DNA might have a similar function if the histones don't protect the 
unexpressed DNA from carcinogens. If anyone knows whether the chemical 
carcinogens can penetrate the histones, then please e-mail me. 

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