>1a7tB (B:) observed residues (from ATOM records)
svkisddisitqlsdkvytyvslaeiegwgmvpsngmivinnhqaalldtpindaqteml
vnwvtdslhakvttfipnhwhgdcigglgylqrkgvqsyanqmtidlakekglpvpehgf
tdsltvsldgmplqcyylggghatdnivvwlptenilfggcmlkdnqttsignisdadvt
awpktldkvkakfpsaryvvpghgnyggteliehtkqivnqyiests