title: Localization of C4 genes within the HLA complex by molecular genotyping.
abstract: Segregation of the complement component, C4, was analyzed in six families that each included an individual who inherited an HLA haplotype where a crossover event had occurred in the region between HLA-B and HLA-DR. Two cDNA clones corresponding to the C4 gene were utilized as probes in Southern blot analysis of DNA from members of each family. Restriction fragment length polymorphisms (RFLP) were observed and were assigned to haplotypes. In one family RFLP, hybridizing with the C4 probes, segregrated with HLA-B, and in four families RFLP segregated with HLA-DR; one family was not informative in this respect. These analyses have made it possible to localize the genes for C4 between HLA-B and HLA-DR by molecular genotyping and to characterize three different genomic configurations of C4 genes by limited restriction mapping.
authors.forename: M A
authors.initials: MA
authors.lastname: Robinson
authors.forename: M C
authors.initials: MC
authors.lastname: Carroll
authors.forename: A H
authors.initials: AH
authors.lastname: Johnson
authors.forename: R J
authors.initials: RJ
authors.lastname: Hartzman
authors.forename: K T
authors.initials: KT
authors.lastname: Belt
authors.forename: T J
authors.initials: TJ
authors.lastname: Kindt
mesh_terms: D002874:Chromosome Mapping; D003181:Complement C4 / Q000235:genetics*; D004247:DNA / Q000378:metabolism; D004262:DNA Restriction Enzymes / Q000378:metabolism; D005802:Genes, MHC Class II; D006680:HLA Antigens / Q000235:genetics*; D006801:Humans; D009693:Nucleic Acid Hybridization
chemical_list: D003181:Complement C4; D006680:HLA Antigens; D004247:DNA; D004262:DNA Restriction Enzymes