>2z4mB (B:) observed residues (from ATOM records)
mlkagvhfghqtrywnpkmkpfifgarnkvhiinlektvpmfnealaelnkiasrkgkil
fvgtkraaseavkdaalscdqffvnhrwlggmltnwktvrqsikrlkdletqsqdgtfdk
ltkkealmrtreleklenslggikdmgglpdalfvidadhehiaikeannlgipvfaivd
tnsdpdgvdfvipgnddairavtlylgavaatvregrs