G Protein-Coupled Receptors

 1TM Signaling Receptors

 Nuclear Receptors

 Ion Channels

   Cys-loop superfamily

     GABA-A

     Glycine

     Anionic glutamate

     Acetylcholine (nicotinic)

     Serotonin (5-HT3)

   Glutamate-gated cation channels

   Epithelial and related Na+ channels

   Voltage-gated cation channels

   Related to voltage-gated cation channels

   Related to inward rectifier K+ channels

   Chloride channels

   Related to ATPase-linked transporters

   Related to neurotransmitter transporters

 Other Channels