>4xixB (B:) observed residues (from ATOM records)
awnygevagpptwkgvcatgkrqspiniplntsapkvdaemgefdfaygsfekcdvlntg
hgtmqvnfpagnlafignmelellqfhfhapsehamdgrryameahlvhknkstgnlavl
gimlepggliknpalstalevapevplakkpspkginpvmllpkkskagtrpfvhypgsl
ttppcsegvdwfvfmqpikvpdsqildfmrfvgdnktyatntrplqllnsrlveyel