Natural site-directed mutagenesis might exist in eukaryotic cells
  Site-directed mutagenesis refers to a man-made molecular biology method that is used to make genetic alterations in the DNA sequence of a gene of interest. But based on our recently published experimental findings, we propose that natural site-directed mutagenesis might exist in the eukaryotic cells, which is triggered by harmful agents and co-directed by special transcription hotspots and mutation-contained intranuclear primers. 
Gao-De Li
q-bio.SC