>1xbsA (A:) observed residues (from ATOM records)
msfllpkltskkevdqaikstaekvlvlrfgrdedpvclqlddilsktssdlskmaaiyl
vdvdqtavytqyfdisyipstvfffngqhmkvdygspdhtkfvgsfktkqdfidlieviy
rgamrgklivqspidpk