The invention relates to isolated DMI11 genes from Medicago truncatula which play a major role both in the early steps of Nod factor signaling that trigger several key developmental responses in the host plant and in the establishment of mycorrhizal symbiosis. A sequence generator is adapted to output a plurality of sequence values based on a step control signal. Responsive to the search query, a general search result is generated by searching the general search object. Portions of the first insulator layer are removed at least over the magnetic memory devices and then the cap layers are selectively removed from the magnetic memory devices, thus exposing active top surfaces of the magnetic memory devices. The system can be used, among other things, in EUV lithography, in the planning and optimal design of laser systems and electron sources, in material analysis by phase contrast imaging, and in superconductor research.