>1na6B (B:) observed residues (from ATOM records)
svfhnwlleiacenyfvyikrlsandtgatgghqvglyipsgiveklfpsinhtrelnps
vfltahvsshdcpdsearaiyynsahfgktrnekritrwgrgsplqdpentgaltllafk
ldeqggdckevniwvcastdeedvietaigevipgalisgpagqilgglslqqapyilpe
dwhlrfpsgseiiqyaashyvknsldpdeqlldrrrveydifllveelhvldiirkgfgs
vdefialansvsnrrksragkslelhlehlfiehglrhfatqaitegnkkpdflfpsaga
yhdtefpvenlrmlavkttckdrwrqilneadkihqvhlftlqegvslaqyremresgvr
lvvpsslhkkypeavraelmtlgafiaeltglyad