The phrase "a activates" is not correct in standard written English.
It may be intended to describe a subject (a) that triggers or initiates an action (activates), but it lacks clarity and proper grammatical structure.
Example: "The button a activates the machine when pressed."
Alternatives: "a triggers" or "a initiates".
In this network, directed edges (links) between pairs of proteins represent regulatory interactions (i.e., activating or inhibitory) — e.g., the directed edge "A → B" denotes that protein "A" activates or inhibits protein "B".
In this oscillator, an activator protein, A, activates transcription of both itself and a repressor, R. The repressor achieves its effect by forming a complex, C, with A, that does not activate transcription.
In Figure 1, A activates B, then B activates C. The concentration of activated C is the output of this system.
The node N a activates the p-cycle by injecting the multicast traffic into the protection segment [ N a,N e ].
In human dermal fibroblasts[74], (C) SAHA-PIP K and (D) SAHA-PIP A activates gene regulatory network associated with and germ cell and pancreas function such as glucose metabolism, respectively[12, 75].
The results indicate whether or not a specific gene activates another, i.e. whether A activates B, A activates C, etc. Thus there are six different tests (AB, AC, BA, BC, CA, and CB).
It may be hypothesized that low intensity anxiety, such as worry and tension, as measured by HADS-A, activates proinflammatory cytokines or neurohormonal stress activity less than diagnostic categories of anxiety, such as panic disorders and agoraphobic disorder.
VEGF-A activates Akt through VEGF receptor-2 and elicits a potent angiogenic stimulation in ECs15.
Wild-type Aurora-A activates RalA and phosphorylates RalA at serine194 to promote cellular transformation and migration [ 38].
Furthermore, they showed that treatment of B cells with the F-actin inhibitor Lat-A, activates the B cells [114].
Moreover, ectopic expression of NT-PGC-1 α-a activates the muscle transcription program in cultured myotube cells, enhancing mitochondrial oxidative capacity.
