The phrase "as a factor activating" is correct and usable in written English.
It can be used in contexts where you are discussing elements that contribute to or trigger a particular outcome or process.
Example: "The increase in temperature acts as a factor activating the chemical reaction."
Alternatives: "as a catalyst for" or "as a trigger for".
Although CSDA has been reported to function as a transcription factor, activating target genes such as PCNA and cyclin D1 that regulate proliferation and morphogenesis in epithelial cells, we did not detect significant changes in specific luciferase activity of either PCNA- or cyclin D1-luciferase constructs, co-expressed with Bcr-Abl and either CSDA or CSDAS134A constructs (data not shown).
GAMYB functions as a transcription factor, activating the expression of its downstream target genes regulating the exine and Ubisch body formation in pollen by directly binding to their promoters (Aya et al. 2009).
The majority of stabilized p53 accumulates in the nucleus where it functions as a transcription factor, activating expression of genes that induce either apoptosis or cell cycle arrests that can be either transient (quiescence) or permanent (senescence).
VDR acts as a transcription factor activated by a ligand and is encoded by the vitamin D receptor gene [ 8].
MdERF1, as a transcription factor, activates the expression of PR genes such as MdCHIB by binding to their promoter region.
The SPL5 gene may act as a negative regulatory factor activating the serotonin metabolic pathway, and these results might provide a new insight into the spl5-induced defense response mechanisms in plants.
Most of the actions of testosterone take place via the androgen receptor as a transcription factor activated by testosterone.
Although IRF5 is best known as a transcription factor activated by TLR signaling, we observed that splenocytes from mice deficient in MyD88, the common adapter for all TLRs, shows killing activity against B16 cells at a rate even slightly higher than those from WT mice.
The hereditary diseases psoriasis and atopic eczema are examples of skin disorders in which sunlight (as an extrinsic factor) or stress (as an intrinsic factor) activate the condition.
The SPL5 may act as a negative regulatory factor activating the serotonin metabolic pathway, which is mediated by OsWRKY14.
