title: A physical map of the human complement component C6, C7, and C9 genes.
abstract: The genes for human complement components C6, C7, and C9 are linked on chromosome 5. In this report we describe the physical linkage between C6 and C7 genes. DNA fragments obtained by digestion with several rare-cutting restriction enzymes were separated through pulsed field gel electrophoresis. Hybridization with probes corresponding to the 5' and 3' ends of the three cDNAs showed common bands for the C6 and C7 genes. Both genes are contained in a NotI fragment of 500 kilobases (kb). Moreover, the presence of common 3' C6 and 3' C7 fragments indicates that both genes are oriented in a tail-to-tail, reverse way relative to transcription. No evidence of physical linkage between C9 and C6 or C7 was found in the range 50 kb-2.5 megabases (Mb).
authors.affiliation: Servicio de Inmunologia, Hospital Central Universitario de Asturias, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Setién
authors.forename: V
authors.initials: V
authors.lastname: Alvarez
authors.forename: E
authors.initials: E
authors.lastname: Coto
authors.forename: R G
authors.initials: RG
authors.lastname: DiScipio
authors.forename: C
authors.initials: C
authors.lastname: López-Larrea
mesh_terms: D002874:Chromosome Mapping; D003183:Complement C6 / Q000235:genetics*; D003184:Complement C7 / Q000235:genetics*; D003186:Complement C9 / Q000235:genetics*; D008040:Genetic Linkage; D006801:Humans
chemical_list: D003183:Complement C6; D003184:Complement C7; D003186:Complement C9