Drs. Zhu and Jiang in the Zha lab developed FISH probes for murine rDNA (on Addgene:240559), uncovered high somatic and germline heterogeneities in inbred mice, and unique roles of ATM/LIG4/BRCA1 at rDNA, and proposed a model for single-ended DSB at rDNA loci. academic.oup.com/nar/article/...