>1s7tD (D:) observed residues (from ATOM records)
gphslryfvtavsrpglgeprymevgyvddtefvrfdsdaenpryeprarwmeqegpeyw
eretqkakgneqsfrvdlrtllgyynqskggshtiqvisgcevgsdgrllrgyqqyaydg
cdyialnedlktwtaadmaalitkhkweqageaerlraylegtcvewlrrylkngnatll
rtdspkahvthhsrpedkvtlrcwalgfypaditltwqlngeeliqdmelvetrpagdgt
fqkwasvvvplgkeqyytchvyhqglpepltlrwep