>1t7xA (A:) observed residues (from ATOM records)
dgrysltyiytglskhvedvpafqalgslndlqffrynskdrksqpmglwrqvegmedwk
qdsqlqkaredifmetlkdiveyykdstgshvlqgrfgceiennrssgafwkyyydgkdy
iefnkeipawvpfdpaaqitkqkweaepvyvqrakayleeecpatlrkylkysknildrq
dppsvvvtshqapgekkklkclaydfypgkidvhwtragevqepelrgdvlhngngtyqs
wvvvavppqdtapyschvqhsslaqplvvpwea