Abstract: A portable device for extracting DNA from a sample comprising a tissue with a plurality of cells. The device includes an opening configured to receive the sample, a first region in fluid communication with the opening and comprising a plurality of tissue processing elements; a second region having a first dehydrated buffer configured to change a first characteristic of the sample and cause lysis of at least some of the plurality of cells in the sample; a third region having a second dehydrated buffer configured to prevent at least some of a plurality of proteins in the sample from progressing from said third region to the fourth region; a fourth region having a third dehydrated buffer configured to purify the DNA from said sample; and an exit designed to allow for the purified DNA to exit the device.