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| Channel/receptor | Descriptor | Biological function associated with descriptor |
| Ion channel (voltage-gated and ligand-gated) | ||
| Voltage-gated sodium (Nav) channel & | β (beta) | Shifts voltage-dependence of Nav channel activation |
| Voltage-gated sodium (Nav) channel & | δ (delta) | Delays inactivation of voltage-activated Nav channels |
| Voltage-gated sodium (Nav) channel & | ι (iota) | Nav channel agonist |
| Voltage-gated sodium (Nav) channel & | μ (mu) | Inhibits voltage-activated sodium (Nav) channels |
| Voltage-gated potassium (Kv) channel | κ (kappa) | Inhibits voltage-activated potassium (Kv) channels |
| Calcium-activated potassium (KCa) channel | λ (lambda) | Inhibits calcium-activated potassium (KCa) channels |
| Inward-rectifier potassium (KIR) channel | η (eta) | |
| Nicotinic acetylcholine receptor (nAChR) # | α (alpha) | Targets acetylcholine receptor |
| Nicotinic acetylcholine receptor (nAChR) # | ψ (psi) | Noncompetitive antagonist of acetylcholine receptor |
| Voltage-gated calcium (Cav) channel | ω (omega) | Inhibits voltage-gated calcium (Cav) channels |
| Ryanodine-sensitive calcium-release (RyR) channel | φ (phi) | |
| P2X receptor (P2RX) | Ο (OMICRON) | |
| Voltage-gated chloride (ClC) channel | ε (epsilon) | |
| CFTR channel | Σ (SIGMA) | |
| Ionotropic GABA receptor | Λ (LAMBDA) | |
| Ionotropic glutamate receptor | Γ (GAMMA) | |
| HCNa nonspecific cation channel | γ (gamma) | |
| Cyclic nucleotide-gated channel (CNG) | ζ (zeta) | |
| Transient receptor potential (TRP) channel | τ (tau) | |
| Acid-sensing ion (ASICs) channel (ACCN) | π (pi) | |
| 5-HT receptor | σ (sigma) | |
| receptor 7TM / G-protein coupled receptor (GPCR) | ||
| Adrenergic receptor | ρ (rho) | |
| Bradykinin receptor | ||
| Cholecystokinin receptor | ||
| Endothelin receptor | ξ (xi) | |
| Dopamine receptor | ||
| Glucagon-like peptide receptor | ||
| Muscarinic acetylcholine receptor | ||
| Neurotensin receptor | ν (nu) | |
| Opioid receptor | ||
| Somatostatin receptor | ||
| Vasoactive intestinal polypeptide receptor | ||
| Vasopressin/oxytocin receptor | υ (upsilon) | |
| receptor 1TM | ||
| Vascular endothelial growth factor receptor (VEGFR) | ||
| Epidermal growth factor receptor (EGFR) | Ω (OMEGA) | |
| Transporter | ||
| Noradrenaline transporter | χ (chi) | |
| Glutamate transporter | ||
| Other activity | ||
| Phospholipase A2 activity | A2 | |
| Cytolytic activity | Δ (DELTA) | |
| Antimicrobial activity / Membrane perturbation activity | M | |
| Protease inhibition | PI | |
| Unknown activity | U | |
| Activity for which no toxin has been discovered yet | Two-pore domain potassium (K2P) channel (KCNK) | θ (theta) |
| Octopamine receptor | ο (omicron) |