title: Use of DNA amplification (PCR) and direct DNA sequencing in the characterization of C4 alleles.
abstract: A procedure for detailed characterization of individual C4 alleles has been developed. DNA containing the two polymorphic clusters of C4 was amplified in the polymerase chain reaction (PCR). Direct DNA sequencing of amplified DNA was then performed by a modification of previously described techniques. The results were confirmed by M13 sequencing. Single C4A3 and C4B1 allele sequences were in accordance with previous reports. An individual typed C4A3B1 revealed double bands in the autoradiogram in the positions corresponding to the polymorphic nucleotides. We did not find the reported thymine in position 3641 specific for the C4A4 allele in an individual typed C4A4B2.
authors.affiliation: Institute of Forensic Medicine, Rikshospitalet, University of Oslo, Norway.
authors.forename: E S
authors.initials: ES
authors.lastname: Berg
authors.forename: G
authors.initials: G
authors.lastname: Markussen
authors.forename: P
authors.initials: P
authors.lastname: Teisberg
authors.forename: B
authors.initials: B
authors.lastname: Olaisen
mesh_terms: D000483:Alleles; D001483:Base Sequence; D003001:Cloning, Molecular; D003181:Complement C4 / Q000235:genetics*; D004247:DNA; D005069:Evaluation Studies as Topic; D005784:Gene Amplification; D006239:Haplotypes; D006801:Humans; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction
chemical_list: D003181:Complement C4; D004247:DNA