>1s7sA (A:) observed residues (from ATOM records)
gphslryfvtavsrpglgeprymevgyvddtefvrfdsdaenpryeprarwmeqegpeyw
eretqkakgneqsfrvdlrtllgyynqskggshtiqvisgcevgsdgrllrgyqqyaydg
cdyialnedlktwtaadmaalitkhkweqageaerlraylegtcvewlrrylkngnatll
rtdspkahvthhsrpedkvtlrcwalgfypaditltwqlngeeliqdmelvetrpagdgt
fqkwasvvvplgkeqyytchvyhqglpepltlrwep