>2f23A (A:) observed residues (from ATOM records)
revkltkagyerlmqqlerererlqeatkilqelmessddyddsgleaakqekarieari
dsledilsravileegsgeviglgsvveledplsgerlsvqvvspaeanvldtpmkisda
spmgkallghrvgdvlsldtpkgkrefrvvaihg