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How did Werner Arber contribute to the development of genetic engineering?

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DNA extraction and recombinant DNA technology — recombinant DNA The process of DNA extraction is necessary to isolate molecules of DNA from cells or tissues. A series of steps, including the use of protease enzymes to strip proteins from the DNA, are required for isolating pure DNA that is suitable for use in later procedures, such as cloning or sequencing.

Werner Arber made a foundational contribution to genetic engineering through his research on the interaction between bacteriophages and their bacterial hosts. During the late 1950s and early 1960s, Arber investigated how bacteria defend themselves against viral infection by producing protective proteins known as restriction enzymes.1

He discovered that these enzymes function by recognizing specific sequences of DNA and cutting the viral molecule into smaller, manageable pieces, thereby restricting the growth of the virus. This work, for which he shared the 1978 Nobel Prize for Physiology or Medicine, provided the essential mechanism for recombinant DNA technology. By enabling scientists to isolate specific gene-containing fragments and recombine them with other DNA molecules, Arber’s discovery of these "molecular scissors" became an indispensable tool for modern cloning and genetic manipulation.12