>2z4lL (L:) observed residues (from ATOM records)
rlntlspaegskkagkrlgrgigsglgktggrghkgqksrsgggvrrgfeggqmplyrrl
pkfgftsrkaaitaeirlsdlakveggvvdlntlkaaniigiqiefakvilagevttpvt
vrglrvtkgaraaieaaggkiee