title: On the origins, structures and functions of restriction-modification enzymes.
authors.affiliation: Section of Genetics, Howard Hughes Medical Institute, Duke University Medical Center, Durham, NC 27710.
authors.forename: J
authors.initials: J
authors.lastname: Heitman
mesh_terms: D001483:Base Sequence; D004247:DNA / Q000378:metabolism; D004262:DNA Restriction Enzymes / Q000737:chemistry / Q000378:metabolism*; D008969:Molecular Sequence Data; D013329:Structure-Activity Relationship
chemical_list: D004247:DNA; D004262:DNA Restriction Enzymes