>4n64B (B:) observed residues (from ATOM records)
gaiagfiengweglidgwygfrhqnaqgegtaadykstqsaidqitgklnrliektnqqf
elidnefnevekqignvinwtrdsitevwsynaellvamenqhtidladsemdklyervk
rqlrenaeedgtgcfeifhkcdddcmasirnntydhskyreeamqnriq