Gene Expression CARLA M
Proc. Natl. Acad. Sci. USA Vol. 92, pp. 2607-2611, March 1995 Evolution Fate of a redundant y-globin gene in the atelid clade of New World monkeys: Implications concerning fetal globin gene expression CARLA M. M. MEIRELES*t, MARIA P. C. SCHNEIDER*t, MARIA I. C. SAMPAIO*t, HoRAcIo SCHNEIDER*t, JERRY L. SLIGHTOM4, CHI-HUA CHIUt§, KATHY NEISWANGERT, DEBORAH L. GuMucIoll, JOHN CZELUSNLAKt, AND MORRIS GOODMANt** *Departamento de Genetica, Universidade Federal do Para, Belem, Para, Brazil; Departments of tAnatomy and Cell Biology and §Molecular Biology and Genetics, Wayne State University School of Medicine, Detroit, MI 48201; tMolecular Biology Unit 7242, The Upjohn Company, Kalamazoo, MI 49007; 1Westem Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, Pittsburgh, PA 15213-2593; and IlDepartment of Anatomy and Cell Biology, University of Michigan Medical School, Ann Arbor, MI 48109-0616 Communicated by Roy J. Britten, California Institute of Technology, Corona Del Mar, CA, December 19, 1994 (received for review August 19, 1994) ABSTRACT Conclusive evidence was provided that y', purifying selection. One outcome was that a mutation that the upstream of the two linked simian y-globin loci (5'-y'- made the qr locus a pseudogene was fixed -65 MYA in the 'y2-3'), is a pseudogene in a major group of New World eutherian lineage that evolved into the first true primates (4, monkeys. Sequence analysis of PCR-amplified genomic frag- 8). A later outcome, most likely favored by positive selection, ments of predicted sizes revealed that all extant genera of the was that embryonically expressed -y-globin genes became platyrrhine family Atelidae [Lagothrix (woolly monkeys), fetally expressed in the primate lineage out of which platyr- Brachyteles (woolly spider monkeys), Ateles (spider monkeys), rhines and catarrhines descended (1-3,9, 10).
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