Exact Sequence Searching
$dnatext = "ggggggCgggCgggCgggg";
print " Original genome: $dnatext \n";
$n_mut = $dnatext =~ s/gC/gg/gi;
print " Found: $n_mut mutation(s)\n";
print " After gene-therapy: $dnatext \n";
Original genome: ggggggCgggCgggCgggg
After gene-therapy: ggggggggggggggggggg