  We offer a theoretical design of new systems that show promise for digital
biochemical computing, including realizations of error correction by utilizing
redundancy, as well as signal rectification. The approach includes information
processing using encoded DNA sequences, DNAzyme biocatalyzed reactions and the
use of DNA-functionalized magnetic nanoparticles. Digital XOR and NAND logic
gates and copying (fanout) are designed using the same components.
