my $this = shift;
    close(GENBANK);

    my $this = shift;

    return $infile;

    my $this = shift;

    while(<GENBANK>){
	last if (/\/\//);
	s/[^A-Za-z]//g;
	$this->{"SEQ"} .= lc($_);
    }

    my $this = shift;
    while(<GENBANK>){
	last if (/^FEATURES/);
    }

    my $this = shift;
    while(<GENBANK>){
	last if (/^ORIGIN/);
    }

    my $this = shift;
    my $msg = shift;
    undef %{$this};
    $this->read_locus($msg);
    $this->read_header();
    $this->read_features();
    $this->getnucs();

    if (length($this->{SEQ}) > 0){
	$this->set_gene_aliases();
	$this->seq_info() unless($msg);
	return 1;
    }else{
	return 0;
    }

    my $this = shift;
    my $len = '100';
    my $opt = shift;
    my $char = '1';
    $len = $opt if ($opt);
    $this->{SEQ} = '';

    while($len > 0 && $char ne ''){
	$char = getc(GENBANK);
	next unless ($char =~ /[a-zA-Z]/);
	$len --;
	$this->{SEQ} .= lc($char);
    }
    $this->{position} = tell GENBANK;

    return $char;

    my $this = shift;
    my $filename = shift;
    $infile = $filename;
    
    open(GENBANK, $filename) || die("Error at G::IO::GenBankI: $!\n");
    return *GENBANK;

    local($_);
    my $this = shift;
    my $num = -1;
    my $cds = 0;
    my $transexc = 0;
    $this->{"CDS0"}->{dummy} = 1;

    while(<GENBANK>){
	if (/^BASE COUNT/){
	    s/BASE COUNT //g;
	    $this->{"BASE_COUNT"} = $_;
	}elsif (/^ORIGIN/){
	    last;
	}elsif (/^ {5}(\S+)\s+(.*)$/ && $_ !~ /\//){
	    my $key = $1;
	    my $feature = $2;
	    $transexc = 0;
	    $num ++;

	    $this->{"FEATURE$num"}->{feature} = $num;
	    $this->{"FEATURE$num"}->{type} = $key;
	    $this->{"FEATURE$num"}->{on} = 1;
	    
	    if ($this->{"FEATURE$num"}->{type} eq "CDS"){
		$cds ++;
		$this->{"FEATURE$num"}->{cds} = $cds;
	    }

	    s/\. \./\.\./g; #for (1. .2) type irregular format
	    s/\^/\.\./g;    #for (1^2) type irregular format

	    my $part_left = tr/\<//d;  #for (<1..2) type irregular format
	    my $part_right = tr/\>//d; #for (1..2>) type irregular format
	    $this->{"FEATURE$num"}->{"partial"} = "$part_left $part_right";

	    if (/join/){
		if (/complement\(join/){
		    $this->{"FEATURE$num"}->{"direction"} = "complement";
		    s/complement//;
		}else{
		    $this->{"FEATURE$num"}->{"direction"} = "direct";
		}

		my $line = $_;
		my $fth = '';
		my $linenum = tell GENBANK;

		while($line !~ /\//){
		    $fth .= $line;
		    last unless ($line =~ /^ {6}/);
		    $line = <GENBANK>;
		    $linenum = tell GENBANK;
		    $linenum -= length($line);
		}
		seek GENBANK, $linenum, 0;

		substr($fth, 0, 19) = '';
		$fth =~ s/join//g;
		$fth =~ s/\(//g;
		$fth =~ s/\)//g;
		$fth =~ s/ //g;
		$fth =~ s/\n//g;
		$fth =~ s/complement/c/g;

		my $tmpfth = $fth;
		$tmpfth =~ s/c//g;
		my @choparray = split(/\.\./, $tmpfth);
		$this->{"FEATURE$num"}->{"start"} = shift @choparray;
		$this->{"FEATURE$num"}->{"end"} = pop @choparray;
		$this->{"FEATURE$num"}->{"join"} = $fth;

		if ($line =~ /\:/){
		    $this->{"FEATURE$num"}->{"partial"} = $line;
		}
	    }elsif (/\?/){
		$this->{"FEATURE$num"}->{"type"} = "partial_$key";
		$this->{"FEATURE$num"}->{"partial"} = $feature;
		msg_error("Partial feature: $feature\n");
	    }elsif (/complement\((\d+)\.\.(\d+)\)/){
		$this->{"FEATURE$num"}->{"direction"} = "complement";
		$this->{"FEATURE$num"}->{"start"} = $1;
		$this->{"FEATURE$num"}->{"end"} = $2;
	    }elsif (/(\d+)\.\.(\d+)/){
		$this->{"FEATURE$num"}->{"direction"} = "direct";
		$this->{"FEATURE$num"}->{"start"} = $1;
		$this->{"FEATURE$num"}->{"end"} = $2;
	    }elsif (/\s+complement\((\d+)\)/){
		$this->{"FEATURE$num"}->{"direction"} = "complement";
		$this->{"FEATURE$num"}->{"start"} = $1;
		$this->{"FEATURE$num"}->{"end"} = $1;
	    }elsif (/\s+(\d+)/){
		$this->{"FEATURE$num"}->{"direction"} = "direct";
		$this->{"FEATURE$num"}->{"start"} = $1;
		$this->{"FEATURE$num"}->{"end"} = $1;
	    }elsif (/replace\((\d+)\,\"/){
		$this->{"FEATURE$num"}->{"direction"} = "direct";
		$this->{"FEATURE$num"}->{"direction"} = "complement" if (/complement/);
		$this->{"FEATURE$num"}->{"start"} = $1;
		$this->{"FEATURE$num"}->{"end"} = $1;
		$this->{"FEATURE$num"}->{"partial"} = $_;
	    }elsif (/(\d+).*\.\..*(\d+)/){
		$this->{"FEATURE$num"}->{"direction"} = "direct";
		$this->{"FEATURE$num"}->{"direction"} = "complement" if (/complement/);
		$this->{"FEATURE$num"}->{"start"} = $1;
		$this->{"FEATURE$num"}->{"end"} = $2;
		$this->{"FEATURE$num"}->{"partial"} = $_;
	    }else{
		msg_error("Irregular location feature: $key $feature\n");
	    }

	}else{
	    if (/\/(\w+)=\"([^\"]+)\"/){
		if(length($this->{"FEATURE$num"}->{"$1"})){
		    $this->{"FEATURE$num"}->{"$1"} .= "\t" . $2;
		}else{
		    $this->{"FEATURE$num"}->{"$1"} = $2;
		}
	    }elsif (/\/(\w+)=\"([^\"]+)/){
		my $tag = $1;
		my $tmp = $2;
		my $line;
		while(<GENBANK>){
		    if (!/\"/){
			$tmp .= $_;
		    }elsif (/([^\"]+)\"/){
			$tmp .= $1;
			last;
		    }
		}
		$tmp =~ s/\s+/ /g;
		$tmp =~ s/ //g if ($tag eq 'translation');
		$this->{"FEATURE$num"}->{$tag} = $tmp;
	    }elsif (/\/(\w+)=([\d|\d+])/){
		$this->{"FEATURE$num"}->{$1} = $2;
	    }elsif (/\/(\w+)=\((.*)\)/){
		my $key = $1;
		my $val = $2;

		if ($key eq 'transl_except'){
		    if ($transexc == 0){
			$this->{"FEATURE$num"}->{$key} = $2;
		    }else{
			$this->{"FEATURE$num"}->{"$key" . $transexc} = $2;
		    }
		    $transexc ++;
		}else{
		    $this->{"FEATURE$num"}->{$key} = $val;
		}
	    }elsif (/\/(\w+)=(.*)/){
		$this->{"FEATURE$num"}->{$1} = $2;
	    }elsif (/\/(\w+)/){
		$this->{"FEATURE$num"}->{$1} .= '1';
	    }
	}
    }

    my $this = shift;
    my $line = '';

    while($line = <GENBANK>){
#	if ($line =~ /^COMMENT/){
#	    s/COMMENT     //g;
#	    while($line = <GENBANK>){
#		last if ($line =~ /^FEATURES/);
#		last unless (substr($line, 0, 1) eq ' ');
#		$line =~ s/  +//g;
#		$this->{"COMMENT"} .= $line;
#	    }
#	}
	last if ($line =~ /^FEATURES/);
	$this->{HEADER} .= $line;
    }

    my $this = shift;
    my $msg = shift;
    my $tmp = '';
    local($_);

    while(<GENBANK>){
	next unless (/LOCUS/);

	my @locus_line = split;
	shift @locus_line;

	if ($#locus_line == 6){
	    $this->{"LOCUS"}->{"circular"} = 1;
	    ($this->{"LOCUS"}->{"id"},
	     $this->{"LOCUS"}->{"length"},
	     undef,
	     $this->{"LOCUS"}->{"nucleotide"},
	     undef,
	     $this->{"LOCUS"}->{"type"},
	     $this->{"LOCUS"}->{"date"}) = @locus_line;
	}elsif ($#locus_line == 5){
	    $this->{"LOCUS"}->{"circular"} = 0;
	    ($this->{"LOCUS"}->{"id"},
	     $this->{"LOCUS"}->{"length"},
	     undef,
	     $this->{"LOCUS"}->{"nucleotide"},
	     $this->{"LOCUS"}->{"type"},
	     $this->{"LOCUS"}->{"date"}) = @locus_line;
	}else{
	    msg_error("ERROR: Unknown LOCUS definition\n") if ($msg ne 'no msg');
	    $this->{"LOCUS"}->{"circular"} = 0;
	    $this->{"LOCUS"}->{"id"} = shift @locus_line;
	}
	last;
    }

    my $this = shift;
    seek GENBANK, $this->{origin}, 0;
    return 1;