>3k7sD (D:) observed residues (from ATOM records)
trrvaigtdhpafaihenlilyvkeagdefvpvycgpktaesvdypdfasrvaemvarke
vefgvlacgsgigmsiaankvpgvraalchdhytaamsrihndanivcvgerttgvevir
eiiitflqtpfsgeerhvrriekiraieash