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. 2023 Jul 21;69(4):81. doi: 10.1007/s10344-023-01709-8

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© The Author(s) 2023

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Fig. 4 — Sequential FISH in X. laevis chromosomes. Cross-species painting FISH experiments with whole chromosome painting probes from a XTR 1 (in red) and XTR 8 (in green) illustrate that b the U1 locus (in red) is localized on X. laevis chromosomes 1S (XLA 1S), and the U2 locus (in green) on XLA 8L. Both a and b are merged in the RGB channels. Chromosomes were counterstained with DAPI in blue. Scale bars represent 10 µM