Abstract
In situ hybridization of 3H-labelled ribosomal RNA to the chromosomes of rat bone marrow cells revealed that clusters of ribosomal cistrons (rDNA) are located in the secondary constrictions of chromosomes No. 3 and 12 and near the centromere of chromosome No. 11, both associated with the late DNA-replicating regions. They were not found in Nos. 1, 2, 13, 19, 20, and the Y chromosome.
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Kano, Y., Maeda, S. & Sugiyama, T. The location of ribosomal cistrons (rDNA) in chromosomes of the rat. Chromosoma 55, 37–42 (1976). https://doi.org/10.1007/BF00288325
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DOI: https://doi.org/10.1007/BF00288325