>2xnaA (A:) observed residues (from ATOM records)
qlleqspqflsiqegenltvycnsssvfsslqwyrqepgegpvllvtvvtggevkklkrl
tfqfgdarkdsslhitaaqpgdtglylcagagsqgnlifgkgtklsvkpniqnpdpavyq
lrdskssdksvclftdfdsqtnvsqskdsdvyitdkcvldmrsmdfksnsavawsnksdf
acanafnnsiipedtffps