In
molecular biology,
activating transcription factor,
ATF, is a group of
bZIP transcription factors, which act as homodimers or heterodimers with a range of other bZIP factors. First, they have been described as members of the
CREB/ATF family, whereas it turned out later that some of them might be more similar to
AP-1-like factors such as
c-Jun or
c-Fos.