Molecular Biology and Evolution, Vol 8, 579-591, Copyright © 1991 by Society for Molecular Biology and Evolution
M Phillips, RH Rice, P Djian and H Green
In all anthropoid species, the coding region of the involucrin gene
contains a segment of short tandem repeats that were added sequentially,
beginning in a common anthropoid ancestor. The involucrin coding region of
each of two platyrrhine species, the white-fronted capuchin (Cebus
albifrons) and the cottontop tamarin (Saguinus oedipus), has now been
cloned and sequenced. These genes share with the genes of the catarrhines
the repeats added in the common anthropoid lineage (the early region).
After their divergence, the platyrrhines, like the catarrhines, continued
to add repeats vectorially 5' of the early region, to form a middle region.
The mechanism that was established in the common anthropoid lineage for the
addition of repeats at a definite site in the coding region was transmitted
to both platyrrhines and catarrhines, enabling each to generate its middle
region independently. The process of vectorial repeat addition continued in
two platyrrhine sublineages after their divergence from each other.
ORIGINAL ARTICLE
The involucrin genes of the white-fronted capuchin and cottontop tamarin: the platyrrhine middle region
Department of Environmental Toxicology, University of California, Davis.
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