Abstract
Genetic polymorphism in C4 in the chimpanzee was studied by agarose gel electrophoresis of desialated plasma and development of patterns by immunofixation with antiserum to human C4 and by a C4-sensitive hemolytic overlay. In general, immunofixation patterns showed multiple partially overlapping bands of which only the most cathodal had strong hemolytic activity. In analogy to human C4, the latter were designated C4B, whereas those detected by immunofixation which had little hemolytic activity were designated C4A. Chimp C4A and C4B reacted with human and mouse (monoclonal) anti-C4B and human anti-Ch1 but neither reacted with monoclonal anti-C4A or human anti-Ch2, Ch3, Rg1, or Rg2. On sodium dodecyl sulfate polyacrylamide gel electrophoresis, the alpha chain of C4B showed a slightly lower apparent relative mass than that of C4A at around M r 93 000. There were three C4A variants and two C4B variants inherited in families as autosomal codominant traits, as C4A-C4B cosegregating pairs with no detectable crossing-over. These pairs were inherited with chimpanzee leukocyte antigen types C2 and BF variants without detectable crossing-over. Half-null C4 haplotypes with C4B *Q0 were observed in family studies. Nine BF, C2, C4A, C4B allelic haplotypic combinations (complotypes) were identified among presumably unrelated chimpanzees.
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Abbreviations
- ChLA:
-
chimpanzee leukocyte antigen
- HLA:
-
human leukocyte antigen
- EDTA:
-
ethylenediaminetetraacetate
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Granados, J., Awdeh, Z.L., Chen, J.H. et al. There are two C4 genetic loci and a null allele in the chimpanzee. Immunogenetics 26, 344–350 (1987). https://doi.org/10.1007/BF00343702
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DOI: https://doi.org/10.1007/BF00343702