>1s3fA (A:) observed residues (from ATOM records)
mkavvptgkiylgspfysdaqreraakakellaknpsiahvffpfdgftdpdekpeiggi
rsmvwrdatyqndltgisnatcgvflydmdqlddgsafeigfmramhkpvilvpftehpe
kekkmnlmiaqgvttiidgntefekladynfnecpsnpvrgygiy