>3tznB (B:) observed residues (from ATOM records)
mhltargltldlsrpqvmgilnnldqalqhaqrmlsagatlidirvvpvvealaqrfdvw
lsvdtskaavitesahagahlindiglpvclmhlmtdinrffqhhiercvaagiaknkll
ldpgfgfgknlahnyqllahlselhhfelpllvgmsrksmvgqllnvppqqrvigsvaca
viaamqgaqiirvhdvketveamciveatrsa