>3dl2B (B:) observed residues (from ATOM records)
gssksvnkitvvgggelgiactlaisakgiadrlvlldlsegtkgatmdleifnlpnvei
skdlsasahskvviftvnsqsyldvvqsnvdmfralvpalghysqhsvllvasqpveimt
yvtwklstfpanrvigigcnldsqrlqyiitnvlkaqtkevwvigeqgedkvltwsgqee
vvshtsqvqlsnramellrvkgqrswsvglsvadmvdsivnnkkkvhsvsalakgyydin
sevflslpcilgtngvseviktlkdtvteklqssassihslqqqlkl