“…The Web of Science Core Collection revealed 10,251 papers, whereas the EspaceNet Worldwide Database provided 1,329 patents. In order to avoid terminology limitations, multiple search queries were used (Batzias and Siontorou 2012): cell, bacterial, microbial, algae, yeast, protozoa, etc. The produced data set was categorized according to the type of cell, the transduction strategy, and the field of application to form subject categories in order to highlight the propagation of the research trends.…”