Replication of UV irradiated circular single stranded phage M 13 DNA by Escherichia coli RNA polymerase ( EC 2 . 7 . 7 . 6 ) and DNA polymerase 3 holoenzyme ( EC 2 . 7 . 7 . 7 ) in the presence of single stranded DNA binding protein yielded full length as well as partially replicated products . ^^^