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Vol. 119, No. 1-2, 2007
Issue release date: December 2007
Cytogenet Genome Res 119:154–157 (2007)
(DOI:10.1159/000109633)

A neocentromere derived from a supernumerary marker deleted from the long arm of chromosome 6

Qin N. · Bartley J. · Wang J.-C. · Warburton P.E.
aGenzyme Genetics, Orange; bGenzyme Genetics, Pasadena, CA cDepartment of Human Genetics, Mount Sinai School of Medicine, New York, NY (USA)

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Abstract

Parental chromosome studies were referred to us after initial finding of a balanced translocation involving chromosomes 4 and 15 in their phenotypically abnormal male child (cytogenetic analysis was done at another laboratory). In addition to the same 4;15 translocation, the father also had an interstitial deletion of the long arm of one chromosome 6 and a marker chromosome. In this article, we report a neocentromere on this marker, which was determined to be composed of chromosome 6 material by FISH. The child’s karyotype was re-interpreted to be unbalanced due to the presence of the abnormal chromosome 6, but without the marker. The clinical phenotype associated with the interstitial deletion of chromosome 6 is also reported.



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References

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    External Resources

  3. Cardone MF, Alonso A, Pazienza M, Ventura M, Montemurro G, et al: Independent centromere formation in a capricious 7.2 Mbp domain of chromosome 13 in humans, Old World monkeys, and pigs. Genome Biol 7:R91 (2006).
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  12. Yu S, Barbouth D, Benke PJ, Warburton PE, Fan YS: Characterization of a neocentric supernumerary marker chromosome originating from the Xp distal region by FISH, CENP-C staining, and array CGH. Cytogenet Genome Res 116:141–145 (2007).


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