Summary
Using DAPI staining after pretreatment with distamycin A we detected a familial deficiency of chromosome 16 heterochromatin. A distinct positively staining band, however, was seen after C-banding. Thus, by using these different heterochromatin staining methods, heterogeneity of the constitutive heterochromatin in the centromeric region of human chromosome 16 was indicated. The same C-banding procedure was also applied to a previously described familial deficiency of chromosome 9 heterochromatin evidenced using distamycin A/DAPI staining and G 11 staining (Buys et al., 1979). In this case a C-band appeared to be virtually absent on the relevant chromosome. These staining methods may be valuable tools in the study of chromosome polymorphisms.
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Buys, C.H.C.M., Anders, G.J.P.A., Gouw, W.L. et al. A comparison of constitutive heterochromatin staining methods in two cases of familial heterochromatin deficiencies. Hum Genet 52, 133–138 (1979). https://doi.org/10.1007/BF00284607
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DOI: https://doi.org/10.1007/BF00284607