>1exrA (A:) observed residues (from ATOM records)
eqlteeqiaefkeafalfdkdgdgtittkelgtvmrslgqnpteaelqdminevdadgng
tidfpeflslmarkmkeqdseeelieafkvfdrdgnglisaaelrhvmtnlgekltddev
demireadidgdghinyeefvrmmvs