Abstract: The invention relates to a microinjection process for introducing an injection substance, particularly genetic material, into procaryotic and eucaryotic cells, as well as cell compartments of the latter (plastids, cell nuclei). It is disadvantageous in the prior art that the cell is damaged by the glass pipette. This problem is obviated by the invention in that the nanopipette (10), which has an external diameter of 0.05 to 0.2 .mu.m, an internal diameter of 0.1 to 1.5 mm and a tip diameter of 0.025 to 0.3 .mu.
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