>1s3sB (B:) observed residues (from ATOM records)
pnrlivdeainednsvvslsqpkmdelqlfrgdtvllkgkkrreavcivlsddtcsdeki
rmnrvvrnnlrvrlgdvisiqpcpdvkygkrihvlpiddtvegitgnlfevylkpyflea
yrpirkgdiflvrggmravefkvvetdpspycivapdtvihcegepikredeeeslnevg
yddvggcrkqlaqikemvelplrhpalfkaigvkpprgillygppgtgktliaravanet
gaffflingpeimsklagesesnlrkafeeaeknapaiifideldaiapkrekthgever
rivsqlltlmdglkqrahvivmaatnrpnsidpalrrfgrfdrevdigipdatgrleilq
ihtknmkladdvdleqvanethghvgadlaalcseaalqairkkmdlidledetidaevm
nslavtmddfrwalsq