_:b666499553 . _:b666499553 . _:b666499553 . _:b666499553 . _:b666499553 "ISBN:0123195837" . _:b666499553 . _:b666499553 . _:b666499553 . _:b666499553 . _:b666499553 "Structural homology that involves structures with the same or similar relative positions." .