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. 1987 Mar;7(3):1289–1292. doi: 10.1128/mcb.7.3.1289

Human ribosomal DNA fragments amplified in hamster cells are transcribed only by RNA polymerase II and are not silver stained.

V N Dhar, D A Miller, A B Kulkarni, O J Miller
PMCID: PMC365206  PMID: 2436041

Abstract

Cloned human rRNA gene fragments that included the promoter region were introduced into Chinese hamster dihydrofolate reductase-deficient (dhfr-) cells by cotransformation with a dhfr minigene and amplified by selection for methotrexate resistance. The human ribosomal DNA was transcribed by RNA polymerase II, not RNA polymerase I or III. The metaphase chromosome regions containing the transcriptionally active human ribosomal DNA failed to show silver staining.

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Selected References

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