>5xffA (A:) observed residues (from ATOM records)
dlpldplwefprdrlvlgkplgegafgqvvraeafgmdparpdqastvavkmlkdnasdk
dladlvsemevmkligrhkniinllgvctqegplyvilecaakgnlreflrarrppgppl
sfpvlvscayqvargmqylesrkcihrdlaarnvlvtednvmkiadfgllpvkwmapeal
fdrvythqsdvwsfgillweiftlggspypgipveelfsllreghrmdrpphcppelygl
mrecwhaapsqrptfkqlvealdkvllav