>1b7tZ (Z:) observed residues (from ATOM records)
klsqdeiddlkdvfelfdfwdgrdgavdafklgdvcrclginprnedvfavggthkmgek
slpfeeflpayeglmdceqgtfadymeafktfdregqgfisgaelrhvltalgerlsded
vdeiikltdlqedlegnvkyedfvkkvmagpyp