The phrase "act when expressed" is not commonly used in written English and may be unclear without context.
It could be used in situations where you want to indicate that an action should be taken upon receiving a specific expression or statement.
Example: "You should act when expressed, as it shows your commitment to the team's goals."
Alternatives: "respond when indicated" or "take action upon request".
However, we found that overexpression of the second Drosophila Src family member, Src64B, using a transgenic line (Dodson et al., 1998), showed strong cooperation with Ras ACT when expressed globally in the developing eye or in eye-antennal disc MARCM clones (C.P., A.B., H.R., unpublished data).
Because GEFs can activate multiple GTPases (Rossman et al., 2005) and a dominant negative allele of Rac1, Rac1 N17 (Rac1 DN) (Baek et al., 2010; Luo et al., 1994) showed partial suppression of RhoGEF2 + Ras ACT cooperative interactions when expressed throughout the tissue with ey > Ras ACT (Brumby et al., 2011), it was possible that RhoGEF2 also acts through Rac.
The function of activated PPAR β is dependent on the activities of its putative downstream targets PDK1 and ILK, both of which act as oncogenes when expressed in mammary epithelial cells (Somasiri et al, 2001; Zeng et al, 2002), and are involved in the activation of cell proliferation and survival pathways.
We know sexual abuse is often conducted by people known and trusted by children – why then did fellow teachers not act when pupils expressed concern?
In fact, it may turn out that certain antagonists act as such only when expressed at nonphysiological levels.
Although the Tinker case resolved the legal issue, as a practical matter, many school officials are quick to act when students express unpopular positions.
Alternatively, antibacterial peptides may interact when expressed in combination or may act in a sublethal, bacteriostatic manner.
Conversely, Grb10 encodes an intracellular signalling adaptor protein that, when expressed from the maternal allele, acts to restrict fetal growth and is permissive for adipose deposition in adulthood.
When expressed at high levels, miRNA sponges act as specific competitive inhibitors by binding and sequestering the miRNA of interest.
Importantly, Mnt was able to counteract c-Myc mediated activation even when expressed at low levels, suggesting Mnt to act as a strong repressor by closing the chromatin structure.
In contrast, when expressed in midline cells, Robo2 would be unable to act as a repulsive receptor.
