>1si6X (X:) observed residues (from ATOM records)
ppaqlsvhtvswnsgheraptnleellglnsgetpdviavavqgfgfqtdkpqqgpacvk
nfqslltskgytklkntitetmgltvyclekhldqntlknetiivtvddqkksggivtsf
tiynkrfsfttsrmsdedvtstntkyaydtrldyskkddpsdflfwigdlnvrvetnath
akslvdqnnidglmafdqlkkakeqklfdgwtepqvtfkptykfkpntdeydlsatpswt
dralyksgtgktiqplsynsltnykqtehrpvlakfrvtl