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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Physical mapping of the holoprosencephaly critical region in 21q22.3, exclusion of SIM2 as a candidate gene for holoprosencephaly, and mapping of SIM2 to a region of chromosome 21 important for Down syndrome.

We set out to define the holoprosencephaly (HPE) critical region on chromosome 21 and also to determine whether there were human homologues of the Drosophila single-minded ( sim) gene that might be involved in HPE. Analysis of somatic cell hybrid clones that contained rearranged chromosomes 21 from HPE patients defined the HPE minimal critical region in 21q22.3 as D21S113 to qter. We used established somatic cell hybrid mapping panels to map SIM2 to chromosome 21 within subbands q22.2-q22. 3. Analysis of the HPE patient-derived somatic cell hybrids showed that SIM2 is not deleted in two of three patients and thus is not a likely candidate for HPE1, the HPE gene on chromosome 21. However, SIM2 does map within the Down syndrome critical region and thus is a candidate gene that might contribute to the Down syndrome phenotype.[1]

References

  1. Physical mapping of the holoprosencephaly critical region in 21q22.3, exclusion of SIM2 as a candidate gene for holoprosencephaly, and mapping of SIM2 to a region of chromosome 21 important for Down syndrome. Muenke, M., Bone, L.J., Mitchell, H.F., Hart, I., Walton, K., Hall-Johnson, K., Ippel, E.F., Dietz-Band, J., Kvaløy, K., Fan, C.M. Am. J. Hum. Genet. (1995) [Pubmed]
 
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