>1s3sA (A:) observed residues (from ATOM records)
pnrlivdeainednsvvslsqpkmdelqlfrgdtvllkgkkrreavcivlsddtcsdeki
rmnrvvrnnlrvrlgdvisiqpcpdvkygkrihvlpiddtvegitgnlfevylkpyflea
yrpirkgdiflvrggmravefkvvetdpspycivapdtvihcegepikredeeeslnevg
yddvggcrkqlaqikemvelplrhpalfkaigvkpprgillygppgtgktliaravanet
gaffflingpeimsklagesesnlrkafeeaeknapaiifideldaiapkrekthgever
rivsqlltlmdglkqrahvivmaatnrpnsidpalrrfgrfdrevdigipdatgrleilq
ihtknmkladdvdleqvanethghvgadlaalcseaalqairkkmdlidledetidaevm
nslavtmddfrwalsq