You're looking for the pos function: 
#!/usr/bin/perl

my $string = 'LPNTGVTNNAYMPLLGIIGLVTSFSLLGLXKARRD';

while( $string =~ /([KR])/g ) {
    print "$1 at ", pos($string), $/;
}

__END__
K at 31
R at 33
R at 34

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In reply to Re: match all instances? by rhesa
in thread match all instances? by Anonymous Monk

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