>1tu3D (D:) observed residues (from ATOM records)
klvllgesavgksslvlrfvkgqfqestigaafltqtvcdttveiwdtagqeryhslapm
yyrgaqaaivvyditneesfaraknwvkelivialsgnkadlankravdfqeaqsyaddn
sllfmetsaktsmnvneifmaiakklp