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transactivation

[tran-sak-tuh-veyt, -zak-]

verb (used with object), trans·ac·ti·vat·ed, trans·ac·ti·vat·ing.

to activate the replication of (a viral gene) through the presence of a gene at another locus, especially following a viral infection.

Related forms

trans·ac·ti·va·tion, noun

trans·ac·ti·va·tor, noun

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Transactivation is always a great word to know.

So is callithumpian. Does it mean:

a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

a chattering or flighty, light-headed person.

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