The order of the subunits, called bases, that makes up a particular fragment of DNA in a genome. DNA is a long molecule made up of four different kinds of bases, which are abbreviated A, C, T, and G. A DNA fragment that is 10 bases long might have a base sequence of, for example, ATCGTTCCTG. The particular sequence of bases encodes important information in an individual’s genetic blueprint, and is unique for each individual (except identical twins).