transactivation

/T R AE0 N Z AE1 K T AH0 V EY1 SH AH0 N/
noun
  1. 1

    The activation of something by another entity that has a spatial relationship with it

  2. 2

    The activation of a gene by the presence of another at a different locus, especially following infection by a virus

Source: https://en.wiktionary.org/wiki/transactivation