>2isyB (B:) observed residues (from ATOM records)
nelvdttemylrtiydleeegvtplrariaerldqsgptvsqtvsrmerdgllrvagdrh
leltekgralaiavmrkhrlaerllvdviglpweevhaeacrwehvmsedverrlvkvln
npttspfgnpipglvelgvasenlyfq