DNA Has Four Bases. Some Viruses Swap in a Fifth

Dozens of viruses don't use the same four nucleotide bases found in all other life. New work shows how this is possible—and perhaps more common than we think.

DNA Has Four Bases. Some Viruses Swap in a Fifth
Dozens of viruses don't use the same four nucleotide bases found in all other life. New work shows how this is possible—and perhaps more common than we think.
Read More