title: A frequent DHFR polymorphism detected by an intron fragment.
authors.affiliation: Clinical Neurogenetics Branch, National Institute of Mental Health, Bethesda, MD 20892.
authors.forename: S D
authors.initials: SD
authors.lastname: Detera-Wadleigh
authors.forename: D
authors.initials: D
authors.lastname: Coffman
authors.forename: T
authors.initials: T
authors.lastname: Shimada
mesh_terms: D002895:Chromosomes, Human, Pair 5; D015252:Deoxyribonucleases, Type II Site-Specific; D005787:Gene Frequency; D006801:Humans; D007438:Introns; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D013762:Tetrahydrofolate Dehydrogenase / Q000235:genetics*
chemical_list: D013762:Tetrahydrofolate Dehydrogenase; D015252:Deoxyribonucleases, Type II Site-Specific; C040158:GTAC-specific type II deoxyribonucleases