I have a problem with a pattern match. I want to print what the match is whether it be by using $1 or assigning the match to another variable. It seems to be taking a scalar of the value instead of the value and I don't know why unless perl 5.10.1 is an issue

my $procount2 = 1;

foreach my $readingframe2(@protein){
    my $protein;
    print "string is $readingframe2\n";
    
    my $fada;
    if($readingframe2 =~ /MHGR/){
        print "$1\n";
        ($protein)= $readingframe2 =~ /MHGR/;
        $fada = length($protein);
        print "motif is $protein\n";
        if($fada >=1){
           print "length of motif is $fada\n";
           print OUT1 "Protein $procount2\n$protein\n";
           $procount2++;
        }
    }
}

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Here is what comes up in the console: 

$ perl readingframe.pl
Enter file name
t.txt
Enter output file name
o.txt
string is MHGRRRRRRRRRRRRRRRRRRRRRRRRRRRRRD_MHGRRRRRRRRRRRRRRRRRRRRRRR
+RRRRRRD_
Use of uninitialized value $1 in concatenation (.) or string at readin
+gframe.pl line 68, <> line 2.

motif is 1
length of motif is 1
string is CMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAVTECMAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAVT
string is AWPPPPPPPPPPPPPPPPPPPPPPPPPPPPP_LNAWPPPPPPPPPPPPPPPPPPPPPPPP
+PPPPP_L

[download]

In reply to Regular expression problems by rattytatty

Title:
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