| adenylyl cyclase | DNA | IP3 | RTK |
| autocrine | DNA-binding site | kinase | serine |
| autophosphorylation | effector | ligand | signal |
| Ca2+ | endocrine | ligand gated ion channel | signal amplification |
| calmodulin | G protein | mRNA | signal molecule-binding domain |
| cascade | G protein-coupled receptor | neuron | signal transduction |
| channel | gated ion channel | neurotransmitter | smooth endoplasmic reticulum |
| chemically gated ion channel | GDP | nucleoplasm | synapse |
| conformation | gene expression | paracrine | synaptic signaling |
| convergence | GPCR | phosphate | target cell |
| cyclic adenosine monophosphate | GTP | phosphatidyl inositol bisphosphate | threonine |
| cyclic AMP | guanosine diphosphate | phospholipase | transcription |
| cytoplasm | guanosine triphosphate | phosphorylation | transcription-activating domain |
| DAG | hormone | PIP2 | translation |
| dephosphorylation | hydrophilic | pyrophosphate | transmembrane |
| diacyl glycerol | hydrophobic | receptor | tyrosine |
| dimer | inhibitor | receptor site | α subunit |
| dimerization | inorganic phosphate | receptor tyrosine kinase | β subunit |
| direct contact | inositol trisphosphate | response | γ subunit |
| divergence | ion channel |