The base sequences of T4 DNA are duplicated at the ends of the molecule, resulting in terminal redundancy.
With the help of several enzymes, many copies of DNA are connected by their terminally redundant ends, resulting in close to 6-10 copies.
Concatemers are lengthy DNA strands that are made up of numerous units that are all aligned in the same direction.
Concatemers are cleaved in such a way during assembly that the genome is longer than the T4 gene set. As a result, the genetic map is drawn in a circular pattern, as T4 DNA is modified in a circular pattern.