>1s2uB (B:) observed residues (from ATOM records)
vkkttqlkqmlnskdlefimeahnglsarivqeagfkgiwgsglsvsaqlgvrasneasw
tqvvevlefmsdasdvpilldadtgygnfnnarrlvrkledrgvagacledklfpktnsl
hdgraqpladieefalkikackdsqtdpdfcivarveafiagwgldealkraeayrnaga
dailmhskkadpsdieafmkawnnqgpvvivptkyyktptdhfrdmgvsmviwanhnlra
svsaiqqttkqiyddqslvnvedkivsvkeifrlqrddelvqaedkylp