>1q4sA (A:) observed residues (from ATOM records)
atggnlpdvashypvayeqtldgtvgfvidemtperatasvevtdtlrqrwglvhggayc
alaemlateatvavvhekgmmavgqsnhtsffrpvkeghvraeavrihagsttwfwdvsl
rddagrlcavssmsiavrprrd