435 / | HD | CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY |
283.1 | DF | APPARATUS {9} |
285.1 | .~ Mutation or genetic engineering apparatus {2} | |
285.2 | DF | .~.~> With means for applying an electric current or charge (e.g., electrofusion, electroporation, etc.) |
285.3 | DF | .~.~> Including projectile means |