To this end, using knockout cells in combination with siRNA and
immunoprecipitation approaches, our results revealed that Pen - 2 together with presenilin are sufficient... to form a functionally active enzyme to process Notch.
Furthermore, by chromatin
immunoprecipitation and whole - genome scanning
approaches, we show that the chromosome ends of senescent cells directly contribute to the DNA damage response, and that uncapped telomeres directly associate with many, but not all, DNA damage response proteins.