in what portion of the cell is the majority of dna isolated?
We amplified a 466-bp fragment of KRAS encoding exon 2 and partial intron 2, as well as a 1564-bp fragment of p53 spanning from exon 5 to exon 8, including introns 5, 6, and 7, from both cell lines and DNA isolated from exosomes derived from the same cell lines (Fig. 2A).