>1t91C (C:) observed residues (from ATOM records)
vllkviilgdsgvgktslmnqyvnkkfsnqykatigadfltkevmvddrlvtmqiwdtag
lerfqslgvafyrgadccvlvfdvtapntfktldswrdefliqasprdpenfpfvvlgnk
idlenrqvatkraqawcysknnipyfetsakeainveqafqtiarnalkqetevel