| insertion element or insertion sequence | |
| —n | |
| genetics See transposon a section of DNA that is capable of becoming inserted into another chromosome | |
| insertion sequence or insertion sequence | |
| —n | |
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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a fool or simpleton; ninny. |
insertion sequence n.
Any of several discrete DNA sequences that repeat at various sites on a bacterial chromosome, on certain plasmids, and on bacteriophages and that can move from one site to another on the chromosome, to another plasmid in the same bacterium, or to a bacteriophage.