>2ax7A (A:) observed residues (from ATOM records)
iflnvleaiepgvvcaghdnnqpdsfaallsslnelgerqlvhvvkwakalpgfrnlhvd
dqmaviqyswmglmvfamgwrsftnvnsrmlyfapdlvfneyrmhksrmysqcvrmrhls
qefgwlqitpqeflcmkalllfsiipvdglknqkffdelrmnyikeldriiacsrrfyql
tklldsvqpiarelhqfafdllikshmvsvdfpemmaeiisvqvpkilsgkvkpiyfh