A frequent polymorphism of the complement component C4 gene
نویسندگان
چکیده
منابع مشابه
TaqI RFLP polymorphism of the ovine complement component C4 gene.
Protocol: Reactions were performed as described (2) using 1 ng of DNA and 100 pmoles of each primer. DNA was amplified for 20 cycles using a Perkin Elmer Cetus DNA Thermal Cycler: denaturation, 94°C, 1 min; annealing, 60°C, 1 min; and extension, 70°C, 1.5 min. Ten /il of the reaction was analyzed directly on a 2.5 % NuSieve GTG agarose gel run in Tns-borate buffer. The amplified DNA fragments v...
متن کاملThe complement component C4 of mammals.
Human complement component C4 is coded by tandem genes located in the HLA class III region. The products of the two genes, C4A and C4B, are different in their activity. This difference is due to a degree of 'substrate' specificity in the covalent binding reactions of the two isotypes. Mouse also has a duplicated locus, but only one gene produces active C4, while the other codes for the closely ...
متن کاملEcoRI polymorphism in the human third complement component (C3) gene.
Source/Description A cDNA fragment, pC3.11 (1) was used as probe. Polymorphisms: EcoRI cleavage of genomic DNA reveals a 2 allele polymorphism with band sizes of 5.2 and 5.6 kb. Invariant bands of 11.5, 11.0, 9.0 and 3 0 kb were also present. Frequency: Estimated from 35 unrelated Caucasians. Allele Frequency Dl 5.2 0.67 D2 5.6 0.33 Chromosomal Localisation: The human C3 gene had been assigned ...
متن کاملRegulation of transcription of the TATA-less human complement component C4 gene.
The 5'-sequences flanking the human complement component C4 genes (C4A and C4B) have been analyzed for their ability to direct expression of a reporter gene in cell lines that constitutively express or do not express C4. No difference in the level of reporter gene expression was detected in cells transfected with C4A- or C4B-specific constructs. A series of reporter constructs containing progre...
متن کاملPhylogeny of the C3/C4/C5 complement-component gene family indicates that C5 diverged first.
A phylogenetic analysis of DNA sequences from the C3/C4/C5 complement-component family of vertebrates supported the hypothesis that the C5 gene diverged first from the common ancestor of C3 and C4 and that C3 and C4 diverged later. The close relationship of C3 and C4 was further supported by the fact that a hagfish complement-component gene showed evidence of being more closely related to both ...
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ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 1986
ISSN: 0305-1048,1362-4962
DOI: 10.1093/nar/14.13.5570