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  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 65 (1984), S. 320-324 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The gene locus for hereditary retinoblastoma is on human chromosome 13, band q14. With this gene localization in mind, we cloned DNA fragments from this chromosome. Three of the fragments identify restriction fragment length polymorphisms. These three fragments are from the region 13q12–13q22, the chromosome region which contains the retinoblastoma locus. We expect that these restriction fragment length polymorphisms will be linked to the retinoblastoma locus, and that they will serve in certain retinoblastoma families as predictors of retinoblastoma gene carriers.They will also be useful in studies of other gene loci thought to be on chromosome 13.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Esterase D was quantitatively measured in the red blood cells from three patients from three separate kindreds who had abnormalities of chromosome 13. The esterase D activity was proportional to the number of copies of the q14 region of chromosome 13 present. These findings confirm published data localizing the esterase D gene to chromosome band 13q 14, a region which is important in the etiology of retinoblastoma. Fifty-one additional retinoblastoma patients not known to have any chromosomal defect also underwent esterase D determination. In none of these patients did the esterase D measurement detect a 13q 14 deletion. The normal esterase D levels in this series of 51 retinoblastoma patients suggest that deletion of an esterase D locus is infrequent in retinoblastoma patients. It must be noted that patients who are mosaics, with a 13q14 deletion in only a fraction of all somatic cells, could possibly have normal red blood cell esterase D levels. Further study is necessary to determine if esterase D determination of all retinoblastoma patients is a worthwhile clinical tool.
    Type of Medium: Electronic Resource
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