Human Molecular Genetics, Vol 6, 843-850, Copyright © 1997 by Oxford University Press
B Carritt, TJ Kemp and M Poulter
Almost exactly 50 years ago, R. A. Fisher and R. Race proposed a model for
the evolution of the RH (rhesus) genes in which the less common haplotypes
were derived from the commoner ones by recombination, and in which the gene
order was D-C-E. No direct-evidence bearing on this model was available
then, and has not been until now. Here we present evidence for
non-reciprocal intergenic exchange (gene conversion) occurring once in
human history to generate the common RHCE allele, Ce. We have also used new
polymorphisms to construct haplotypes which suggest that intragenic
recombination played a major role in the generation of the less common
haplotypes, but only if RHD lies 3' of RHCE, i.e. the order is C-E-D. We
provide both genetic and physical evidence supporting this arrangement.
ARTICLES
Evolution of the human RH (rhesus) blood group genes: a 50 year old prediction (partially) fulfilled [published erratum appears in Hum Mol Genet 1997 Aug;6(8):1390]
MRC Human Biochemical Genetics Unit, University College, London, UK. ben@galton.ucl.ac.uk
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