The involucrin gene of Old-World monkeys and other higher primates: synapomorphies and parallelisms resulting from the same gene-altering mechanism

1992 Molecular biology and evolution  
The involucrin gene of platyrrhines and hominoids contains a segment of lo-codon repeats which were added vectorially at the same site in the coding region. We have now cloned and sequenced the involucrin gene of four cercopithecoid monkeystwo macaques (mulatta andfascicularis) and two Cercopithecus monkeys (aethiops and hamlyni). Each gene contains a similar segment of short repeats; some of these were added in a common anthropoid lineage, others were added in a common catarrhine lineage, and
more » ... rhine lineage, and still others were added in a common macaque or Cercopithecus lineage. Repeats added before a lineage diverges become synapomorphies in the sister taxa resulting from the divergence. Repeats added independently in different diverged lineages become parallelisms. The synapomorphies are the result of the action of a targeted duplication mechanism acting in a common ancestral lineage, but the parallelisms are the result of the same duplication mechanism transmitted to successively divergent sublineages and acting independently in each. 1.
doi:10.1093/oxfordjournals.molbev.a040733 pmid:1584012 fatcat:qvne6ogjazdnfmqwm5wsshswnq