DT, they encapsulate the DNA to protect it. Process patented too. DNA occurring naturally can encode roughly the capacity of 100 billion DVDs per gram. As a data storage medium, DNA-based memory is highly valued because, unlike your computer’s hard drive, DNA can last for thousands of years when properly encapsulated. http://www.adnas.com/products/the-signature-dna-difference
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The SigNature Program first involves the design and manufacture of a highly customized and encrypted botanical DNA marker as described above. This Signature DNA Marker is then encapsulated and stabilized so that it is resistant to heat, organic solvents, chemicals and most importantly ultraviolet or UV radiation. Once it has been encapsulated, the Signature DNA Embedment system can be used to embed the SigNature DNA Marker directly onto products or other items or into special inks, threads and other media which in turn can be incorporated into products. Because the portion of DNA in a SigNature DNA Marker used to identify the marker is so minute, it cannot be detected unless it is replicated billions of times over, or amplified. This amplification can only be achieved by applying matching strands of DNA or a primer, and PCR techniques to the SigNature DNA Marker. As a result, the effort required to find, amplify, select and clone the relevant DNA in a SigNature DNA Marker would involve such enormous effort and expense that SigNature DNA Markers are virtually impossible to copy without our proprietary systems. http://www.securitysolutionswatch.com/Interviews/in_Boardroom_ADPN.html