>1z1sA (A:) observed residues (from ATOM records)
nlyfqghmnakeilvhslrllengdargwcdlfhpegvlefpyappgwktrfegretiwa
hmrlfpehltvrftdvqfyetadpdlaigefhgdgvatvsggklaqdyisvlrtrdgqil
lyrdfwnplrhlealg