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.
And because we wanted to pinpoint specific cities, we omitted expensive counties with multiple large population centers, such as Orange County, Cal., and Nassau County, N.Y. Take a look at our 2014 list of the 10 most expensive places to live in the U.S. The Cost of Living Index is based on annual data from 2013.Data on population, household incomes and home values is provided by the U.S. Census Bureau.edian Home Value: $477,800 (U.S.: $181,400). The sun, surf and sand might be free in San Diego, but you pay a stiff price to live there. Housing costs are more than double the national average in this Southern California city.