>3st2B (B:) observed residues (from ATOM records)
kgeelftgvvpilveldgdvnghkfsvsgegegdatygkltlkficttgklpvpwptllt
tigyglmcfarypdhmkqhdffksampegyvqertiffkddgnyktraevkfegdtlvnr
ielkgidfkedgnilghkleynhdshnvyimadkqkngikvnfkirhniedgsvqladhy
qqntpigdgpvllpdnhylsyqsalskdpnekrdhmvllefvtaagit