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.
Aspen is the most expensive place to buy real estate in the US. Aspen is a mixture of high-end luxury estates and condos intermixed with single-family homes and mobile home parks. As of March 2011, the lowest-priced single-family home on the market was a trailer for $559,000.