>4k6tB (B:) observed residues (from ATOM records)
kydtrtlwttpdtspnctiaqdkdskltlvltkcgsqilanvslivvagkyhiinnktnp
kiksftikllfnkngvlldnsnlgkaywnfrsgnsnvstayekaigfmpnlvaypkpsns
kkyardivygtiylggkpdqpavikttfnqetgceysitfnfswsktyenvefettsftf
syiaqe