>3nv4A (A:) observed residues (from ATOM records) hpaypmpfittilgglypsksillsgtvlpsaqrfhinlcsgnhiafhlnprfdenavvr ntqidnswgseerslprkmpfvrgqsfsvwilceahclkvavdgqhlfeyyhrlrnlpti nrlevggdiqlthvqt