$output = 'test.mrc';
my  $output_entry = $mrc_frame->LabEntry(
		-label=>'Output File Name',
		-labelPack=>[qw/-side left -anchor w/],
		-labelFont=>'9x13bold',
		-relief=>'flat',
		-textvariable=>\$output,
		-width=>15,
		);
my $info_test = $mrc_frame->Button(
	   -text => 'Generate & View',
	   -font => $gui_font,
	   -background =>'#336699',
	   -foreground =>'white',
	   -padx=>4,
	   -pady=>$button_pady,
	   -command =>[sub{
		 printf "pdb2mrc $_[0] $_[1]";						       	},$input_file,$output]
	  )->pack(-pady=>4, -side=>'left');