435 / | HD | CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY |
440 | DF | PROCESS OF MUTATION, CELL FUSION, OR GENETIC MODIFICATION {6} |
455 | DF | .~ Introduction of a polynucleotide molecule into or rearrangement of nucleic acid within an animal cell {11} |
464 | .~.~ Involving gene duplication within the cell (e.g., amplification, co-amplification, etc.) |