Because subunit composition can influence the docking between hemichannels [14], it might be possible to pattern synaptic connections through selective expression of innexins, of which 25 exist in C. elegans (reviewed in [1]-RRB-. (neuraldevelopment.biomedcentral.com)
Examples of three proteins implicated in enzymatic activities with selective expression in skeletal muscle include AMPD1, PYGM and ENO3. (proteinatlas.org)
A regulatory toolbox of MiniPromoters to drive selective expression in the brain. (bcchr.ca)