>1w7tB (B:) observed residues (from ATOM records)
kgeelftgvvpilveldgdvnghkfsvsgegegdatygkltlkficttgklpvpwptlvt
tfsygvqcfsrypdhmkrhdffksampegyvqertiffkddgnyktraevkfegdtlvnr
ielkgidfkedgnilghkleynynshnvyimadkqkngikvnfkirhniedgsvqladhy
qqntpigdgpvllpdnhylstqsalskdpnekrdhmvllafvtaagith