>1n50B (B:) observed residues (from ATOM records)
kaaeqyqgaasavdpahvvrtngapdmsesefneakqiyfqrcagchgvlrkgatgkplt
pditqqrgqqylealitygtplgmpnwgssgelskeqitlmakyiqhtppqppewgmpem
reswkvlvkpedrpkkqlndldlpnlfsvtlrdagqialvdgdskkivkvidtgyavhis
rmsasgryllvigrdaridmidlwakeptkvaeikigiearsvesskfkgyedrytiaga
ywppqfaimdgetlepkqivstrgmtvdtqtyhpeprvaaiiashehpefivnvketgkv
llvnykdidnltvtsigaapflhdggwdsshryfmtaannsnkvavidskdrrlsalvdv
gktphpgrganfvhpkygpvwstshlgdgsisligtdpknhpqyawkkvaelqgqgggsl
fikthpksshlyvdttfnpdarisqsvavfdlknldakyqvlpiaewadlgegakrvvqp
eynkrgdevwfsvwngkndssalvvvddktlklkavvkdprlitptgkfnvyntqhdvy