Searching for the text string "AGAGCTAGCTAGCT" shows the dozens of places that sequence of base pairs shows up in the human genome. You can also check what's nearby on the chromosome by ambling a specific number of base pairs one way or the other along the double helix. I was also curious about the sequence GATTACA, which is of course the name of a movie in which genetic destiny plays a starring role. Unfortunately, the query timed out after about 5 seconds. That limit probably does keep people with seriously strenuous computing chores from hogging Alpha.