>3a68W (W:) observed residues (from ATOM records)
ifepfeevkkeldlvptvpqaslarqkyvdesesavneqinveynvsyvyhamfayfdrd
nvalrglakffkesseeerehaeklmeyqnkrggkvklqsivmplsdfdhadkgdalham
elalslekltnekllnlhsvatkngdvqladfveteylgeqveaikriseyvaqlrrvgk
ghgvwhfdqmllhe