>3df3B (B:) observed residues (from ATOM records)
mlkagvhfghqtrywnpkmkpfifgarnkvhiinlektvpmfnealaelnkiasrkgkil
fvgtkraaseavkdaalscdqffvnhrwlggmltnwktvrqsikrlkdletqsqdgtfdk
ltkkealmrtreleklenslggikdmgglpdalfvidadhehiaikeannlgipvfaivd
tnsdpdgvdfvipgnddairavtlylgavaatvregrs