>3a73A (A:) observed residues (from ATOM records)
ahksevahrfkdlgeenfkalvliafaqylqqcpfedhvklvnevtefaktcvadesaen
cdkslhtlfgdklctvatlretygemadccakqepernecflqhkddnpnlprlvrpevd
vmctafhdneetflkkylyeiarrhpyfyapellffakrykaafteccqaadkaacllpk
ldelrdegkassakqrlkcaslqkfgerafkawavarlsqrfpkaefaevsklvtdltkv
htecchgdllecaddradlakyicenqdsissklkeccekpllekshciaevendempad
lpslaadfveskdvcknyaeakdvflgmflyeyarrhpdysvvlllrlaktyettlekcc
aaadphecyakvfdefkplveepqnlikqncelfeqlgeykfqnallvrytkkvpqvstp
tlvevsrnlgkvgskcckhpeakrmpcaedylsvvlnqlcvlhektpvsdrvtkcctesl
vnrrpcfsalevdetyvpkefnaetftfhadictlsekerqikkqtalvelvkhkpkatk
eqlkavmddfaafvekcccfaeegkklvaasqaalg