title: DNA polymorphism of the C2 and factor B genes. Detection of a restriction fragment length polymorphism which subdivides haplotypes carrying the C2C and factor B F alleles.
abstract: Factor B and the second component of complement (C2) in man are encoded within the major histocompatibility complex by single loci that are less than 1 kb apart. A 2.3 kb factor B-specific cDNA probe has been used to examine, by Southern blot analysis, the genomic DNA of individuals typed for C2 and factor B by protein electrophoresis. We have identified a restriction fragment length polymorphism using the endonuclease Taq I, which subdivides haplotypes carrying both the common variant of C2 (C2C) and the fast (F) variant of factor B. This DNA polymorphism has been mapped to lie in the C2 gene and represents a new genetic marker not defined by protein electrophoresis. This polymorphism may serve as a useful marker in the genetic analysis of diseases that are related to the major histocompatibility complex.
authors.forename: S J
authors.initials: SJ
authors.lastname: Cross
authors.forename: J H
authors.initials: JH
authors.lastname: Edwards
authors.forename: D R
authors.initials: DR
authors.lastname: Bentley
authors.forename: R D
authors.initials: RD
authors.lastname: Campbell
mesh_terms: D000483:Alleles; D003175:Complement C2 / Q000235:genetics*; D011415:Complement Factor B / Q000235:genetics*; D004247:DNA / Q000032:analysis; D004262:DNA Restriction Enzymes; D015252:Deoxyribonucleases, Type II Site-Specific; D004587:Electrophoresis, Agar Gel; D004792:Enzyme Precursors / Q000235:genetics*; D005819:Genetic Markers; D006801:Humans; D008285:Major Histocompatibility Complex; D009838:Oligodeoxyribonucleotides / Q000032:analysis; D011110:Polymorphism, Genetic
chemical_list: D003175:Complement C2; D004792:Enzyme Precursors; D005819:Genetic Markers; D009838:Oligodeoxyribonucleotides; D004247:DNA; D004262:DNA Restriction Enzymes; D015252:Deoxyribonucleases, Type II Site-Specific; C027046:TCGA-specific type II deoxyribonucleases; D011415:Complement Factor B