>2irtB (B:) observed residues (from ATOM records)
skmqafriwdvnqktfylrnnqlvagylqgpnvnleekidvvpiephalflgihggkmcl
scvksgdetrlqleavnitdlsenrkqdkrfafirsdsgpttsfesaacpgwflctamea
dqpvsltnmpdegvmvtkfyfqede