Abstract: Provided herein are methods for producing DNA vectors comprising incubating a population of cells harboring the vector polynucleotide encoding a heterologous nucleic acid operatively positioned between a first and a second AAV inverted terminal repeat DNA polynucleotide sequence (ITRs), with at least one of the ITRs having nucleotide sequences corresponding to AAV wild type ITR in the presence of only a single species of Rep protein having at least DNA binding and DNA nicking functionality, under conditions effective and for a time sufficient to induce production of the DNA within the cells and harvesting and isolating the resultant DNA with the ITRs from the cells.