Thanks for the help. I'm also trying to use the qr function to speed up the regex: 
my $regex = qr/p[^x]+l/;

my @matches = $dna =~ /($regex)/;

[download]
...but I don't know where to place the switches. For example, $regex\migs

Thnnks.

In reply to Re^2: Find and extract substring(s) within larger string. by Anonymous Monk
in thread Find and extract substring(s) within larger string. by Anonymous Monk

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