>2z4nL (L:) observed residues (from ATOM records)
rlntlspaegskkagkrlgrgigsglgktggrghkgqksrsgggvrrgfeggqmplyrrl
pkfgftsrkaaitaeirlsdlakveggvvdlntlkaaniigiqiefakvilagevttpvt
vrglrvtkgaraaieaaggkiee