>4n2yB (B:) observed residues (from ATOM records)
mkqlilaldvmdgekameiakkvaehvdrikvnyplvlsagvgimkrlseikpviadfki
advpytssliariafensaesvivhgfvgsdtlrevcrvaeefggkvyavtelsspggee
fmsavslkivekakeagchgliapstrierlreirkaagdmeilcpieavkyadgiivgr
giyasgnpaeearklrrvlki