FTA™ Indicating Classic Cards are the exact same as the FTA™ Classic Card with a color indicator that changes from pink to white when sample is applied. This FTA™ Classic Card provides four sample areas for application of up to 500µL whole blood or 100µL plant homogenate per card. Convenient for protocols that require different locations for testing and archiving samples. The FTA™ Classic Card utilizes patented QIAGEN® FTA™ technology that simplifies the handling and processing of nucleic acids. FTA™ cards contain chemicals that lyse cells denature proteins and protect nucleic acids from nucleases oxidative and UV damage. FTA™ cards rapidly inactivate organisms including bloodborne pathogens and prevent the growth of bacteria and other microorganisms. They allow you to capture nucleic acids in one easy step. Simply apply your sample to the FTA™ card. Cell membranes and organelles are lysed and the released nucleic acids are entrapped in the fibers of the matrix. The nucleic acids remain immobilized and are stabilized for transport immediate processing or long-term room temperature storage. Since captured nucleic acids are stabilized FTA™ cards facilitate sample collection in remote locations and simplify sample transport. For example you can collect samples in the field without worrying about immediate refrigeration. Ship your samples back to the laboratory without expensive special handling or dry ice and process at your convenience. Four different samples can be collected and even processed independently. 100/Pack.