>4ht3B (B:) observed residues (from ATOM records)
ttllnpyfgefggmyvpqilmpalnqleeafvsaqkdpefqaqfadllknyagrptaltk
cqnitagtrttlylkredllhggahktnqvlgqallakrmgkseiiaetgagqhgvasal
asallglkcriymgakdverqspnvfrmrlmgaevipvhsgsatlkdacnealrdwsgsy
etahymlgtaagphpyptivrefqrmigeetkaqildkegrlpdaviacvgggsnaigmf
adfindtsvgligvepgghgietgehgaplkhgrvgiyfgmkapmmqtadgqieesysis
agldfpsvgpqhaylnsigradyvsitddealeafktlcrhegiipalesshalahalkm
mreqpekeqllvvnlsgrgdkdiftvhdilkar