The length of repetitive sequences of monkey cell and salmon sperm DNA

Summary Reassociated DNA duplexes were isolated from both CV-1 and salmon sperm DNA using the S 1 endonuclease. Sequences reiterated 1000–50,000 times were not found in the CV-1 cell DNA. The mean size of reassociated, double-stranded repetitive molecules, which reassociate at C o t values less than 40, was found to be 500 base pairs in the case of CV-1 cell DNA and 300 base pairs in the case of salmon sperm DNA.