>4nbtB (B:) SEQRES residues mkklegkvavitggakglgqaialayaeegakviagdlgdltyshpnvegmylnvtdvtg vekfyqsvidkygkidilvnnagitkdamtrkmteaqwdavidvnlkgvfnltrlvgpqm qtngygsiinissvvgvfgnigqanyaatkagvigltmtwakefalkganvrvnaiapgy imtdilktvpqdlldkfaaltmlnrlgqpeeiakvalflasddasyvtgqtinvnggmrl