Dot Plot Random.

So now two random sequences of length 20 are fed into the machine (amino acid alphabet). Each time you click the "More" picture two new random sequences are generated and dot-plotted. I've done this a few times now (endlessly amusing), and I personally have become quite convinced that local matches of length more than 3 are very unlikely. The point being, if you spot one, then you've got something quite possibly significant, and worthy of further study. However, although this visual method of finding local alignments is fast and easy, it is not as powerful as that based on dynamic programming, and that we'll get to on the next page.