http://www.perlmonks.org?node_id=229036


in reply to Re: Escaping parentheses in regexps
in thread Escaping parentheses in regexps

And, if you are putting other stuff in your regex that you don't want escaped, end the quotemeta with a \E, ie, 
if ($concat !~ /other stuff\Q$string\E more other stuff/) {
   $concat .= " and $string";
}

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Scott
Project coordinator of the Generic Model Organism Database Project

In Section Seekers of Perl Wisdom