I need to purify some genomic DNA from a human skin punch biopsy. In the past, I have done this with the Qiagen DNEasy Blood and Tissue kit. This yields good quality DNA for routine PCRs, however, I now need to amplify a 14kb fragment from this DNA. The PCR works if the template DNA is unfragmented, but the DNEasy DNA does not work. Is there a better way to purify DNA from human skin so that it doesn't end up fragmented?