The sequence of bases on DNA codes for the sequence of amino acids in proteins. But there are 20 different amino acids and only 4 different bases, so the bases are read in groups of 3. This gives 64 combinations, more than enough to code for 20 amino acids.
10 cheapest places to live in the U.S. Ashland, Ohio, ranks as the 10th most affordable city in the U.S., according to the Council for Community and Economic Research. Ashland has a cost of living index of 87.6.
With this in mind, we set out to identify the most inexpensive cities where you would actually want to live, based on economic health and affordability. We started with the 100 cheapest cities in the U.S., based on cost of living, and then whittled the list down to the top 10. To do so, we required that each city have below-average living costs, high household incomes relative to the cost of living, and an unemployment rate thatâs below the national average.