Described herein are novel biological converter switches that utilize modular components, such as genetic toggle switches and single invertase memory modules (SIMMs), for converting analog inputs to digital outputs, and digital inputs to analog outputs, in cells and cellular systems. Flexibility in these biological converter switches is provided by combining individual modular components, i.e., SIMMs and genetic toggle switches, together. These biological converter switches can be combined in a variety of network topologies to create circuits that act, for example, as switchboards, and regulate the production of an output product(s) based on the combination and nature of input signals received.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A digital-to-analog biological converter switch, the digital-to-analog biological converter switch comprising at least two single invertase memory modules (SIMM), wherein each SIMM comprises at least one module comprising an inducible promoter sequence (iP), a forward recombinase recognition site sequence (RRSfor), an inverted promoter sequence (Pinv), a recombinase gene sequence (RC), a reverse recombinase recognition site sequence (RRSrev), an inverted second inducible promoter sequence (iPinv, 2), and an output product sequence (OP), (iP-RRSfor-Pinv-RC-RRSrev-iPinv, 2-OP)n; wherein the recombinase gene sequence of each SIMM encodes a recombinase that recognizes the RRSfor and RRSrev of that SIMM; and wherein n≧2. 2. The digital-to-analog biological converter switch of claim 1, wherein the inverted promoter sequence (Pinv) of each SIMM has a different promoter strength. 3. The digital-to-analog biological converter switch of claim 1, wherein the recombinases encoded by each SIMM is different. 4. The digital-to-analog biological converter switch of claim 1, wherein the inverted second inducible promoter sequence of each SIMM is induced by the same inducing agent. 5. The digital-to-analog biological converter switch of claim 1, wherein the output product is a reporter protein, a transcriptional repressor, a transcriptional activator, a selection marker, an enzyme, a receptor protein, a ligand protein, an RNA, an iRNA molecule, a riboswitch, or a short-hairpin RNA. 6. The digital-to-analog biological converter switch of claim 1, wherein the output product sequence of each SIMM encodes for the same output product. 7. The digital-to-analog biological converter switch of claim 1, wherein the output product sequence of each SIMM encodes for a different output product. 8. The digital-to-analog biological converter switch of claim 1, wherein the output product sequence of each SIMM encodes for the same reporter protein. 9. The digital-to-analog biological converter switch of claim 8, wherein the reporter protein is a fluorescent reporter. 10. The digital-to-analog biological converter switch of claim 1, wherein the number of SIMMs in the switch is an integer value between and including 2 and 100. 11. The digital-to-analog biological converter switch of claim 1, further comprising at least one ribosome binding sequence. 12. The digital-to-analog biological converter switch of claim 1, further comprising at least one terminator sequence. 13. The digital-to-analog biological converter switch of claim 1, further comprising at least one degradation tag sequence. 14. The digital-to-analog biological converter switch of claim 1, further comprising at least one sequence encoding an iRNA molecule specific for at least one protein encoded by the digital-to-analog biological converter switch. 15. The digital-to-analog biological converter switch of claim 14, wherein the iRNA molecule specific for at least one protein is specific for the recombinase encoded by the SIMM. 16. The digital-to-analog biological converter switch of claim 1, where the promoter sequence of the inducible promoters comprises a sequence selected from any of the promoter sequences of SEQ ID NOs: 1-7, SEQ ID NOs: 167-843, and SEQ ID NOs: 1009-1010. 17. The digital-to-analog biological converter switch of claim 1, where the promoter sequence of the inverted promoter (Pinv) comprises a sequence selected from any of the promoter sequences of SEQ ID NOs: 41-198, SEQ ID NOs: 205-319, and SEQ ID NOs: 1005-1008.