in the art in addition the molecule of interest may also be caused to move to the target tissue by means of other electric pulses or by other means known in the art the molecule of interest may also be dissolved suspended or emulsified in an appropriate carrier a subject molecule desired to be delivered may be selected for entry into the cells for a plurality of reasons including but not intended to be limited to genetically modifying cells inducing the secretion of a substance locally or systemically inducing the production of a substance within a cell inducing the production of a substance that is embedded in the membrane or any other purpose known in the art the system and method of the invention is further described with the use of the following examples of the expression of luciferase in skin tissue of mice and the gastrocnemius muscle of mice a plasmid pcmvluc constructed of dna with a cdna insert that codes for the enzyme lucerifase was propagated in the bacterium e coli and then purified using a quiagen plasmid preparation kit quiagen valencia calif the plasmid was suspended in saline at a concentration of 2 mg ml for use in the.