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.
(Note that the average home prices in Manhattan, San Francisco and San Jose are still higher than in Brooklyn, Marin and Santa Cruz, but so are the wages.) 10 most unaffordable places to live in America. Roughly one in four markets are unaffordable, meaning that buying a median-priced home was less affordable in those places than the historically normal level for that county going back to the first quarter of 2005.