signagen

The Cuo–CymR system is a copper-responsive regulatory module found in certain bacteria that helps maintain copper homeostasis—the balance between essential copper utilization and prevention of copper toxicity. Copper ions are required as cofactors for many enzymes but become highly toxic…

Both DREADDs (chemogenetics) and optogenetics allow precise control of defined cell populations, especially neurons, but they differ fundamentally in how stimulation is delivered, the temporal resolution achieved, and experimental complexity. Feature DREADDs (Chemogenetics) Optogenetics Control modality Designer drug (systemic or…

Designer Receptors Exclusively Activated by Designer Drugs (DREADDs) are engineered GPCRs used to remotely control cellular activity—most commonly neurons—using otherwise inert ligands (e.g., CNO, deschloroclozapine). Feature Gi-DREADD (hM4Di) Gq-DREADD (hM3Dq) Coupled pathway Gi/o signaling Gq/11 signaling Primary effect Inhibition of…

4 Genetically Encoded Calcium Indicators (GECIs) are fluorescent proteins engineered to report intracellular calcium (Ca²⁺) dynamics in living cells. Because Ca²⁺ influx closely accompanies neuronal firing, synaptic activity, muscle contraction, and many signaling pathways, GECIs provide a powerful way to…

4 Luciferase reporters are bioluminescent enzymes that emit light upon reacting with specific substrates. They are widely used for gene expression analysis, promoter studies, in vivo imaging, and high-throughput screening due to their high sensitivity and low background. ⭐ Major…