>3k7sB (B:) observed residues (from ATOM records)
trrvaigtdhpafaihenlilyvkeagdefvpvycgpktaesvdypdfasrvaemvarke
vefgvlacgsgigmsiaankvpgvraalchdhytaamsrihndanivcvgerttgvevir
eiiitflqtpfsgeerhvrriekiraieash