MIKE LAMB mikejonlamb at earthlink.net
Fri Jun 21 16:22:03 EST 1996

I was not contending that cancer prevention was the primary benefit of 
introns. Not by any stretch.  I believe that introns facilitate the 
splicing and introns probably have other functions and benefits.   
"If introns really distract mutagens from hitting exons, wouldn't the
likleyhood of a deletion in an intron/exon increase? Wouldn't this
increase the likleyhood of a frame shift?"
Mutagens cause point mutations far more often than frameshifts. Why 
would a deletion occur? Mutagens bind and prevent correct reading of the 
codon. They do not normally cause deletions to my knowledge. 

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