>1xbtG (G:) observed residues (from ATOM records)
rgqiqvilgpmfsgkstelmrrvrrfqiaqykclvikyakdtrysssealpacllrdvaq
ealgvavigidegqffpdivefceamanagktvivaaldgtfqrkpfgailnlvplaesv
vkltavcmecfreaaytkrlgtekeveviggadkyhsvcrlcyfk