>4nbtC (C:) observed residues (from ATOM records)
kklegkvavitggakglgqaialayaeegakviagdlgdltyshpnvegmylnvtdvtgv
ekfyqsvidkygkidilvnnagitkdamtrkmteaqwdavidvnlkgvfnltrlvgpqmq
tngygsiinissvvgvfgnigqanyaatkagvigltmtwakefalkganvrvnaiapgyi
mtdilktvpqdlldkfaaltmlnrlgqpeeiakvalflasddasyvtgqtinvnggmrl