>4blrB (B:) observed residues (from ATOM records)
mihlydaksfaklraaqyaafhtdapgswfdhtsgvlesvedgtpvlaigvesgdaivfd
knaqrivaykeksvkaedgsvsvvqvengfmkqghrgwlvdltgelvgcspvvaefgghr
yasgmvivtgkgnsgktplvhalgealggkdkyatvrfgeplsgyntdfnvfvddiaram
lqhrvividslknviisrgafdllsdigamaasrgcvviaslnpivelvkeasrsnstsl
vistdvdgewqvltrtgeglqrlthtlqtsygehsvltihtqtvikndelesvlrrl