Your problem are the double-quotes inside the single-quotes.
$prop is probably used as searchstring with the $-sign.

Update
Or are you interested in the matched lines? 
my $info = grep "$prop", <FILE>;
#   or
my @lines = grep "$prop", <FILE>;

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pelagic

In reply to Re: storing grep output to variable by pelagic
in thread storing grep output to variable by Anonymous Monk

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