Shows a non-competitive interaction with adrenergic and muscarinic receptors. Binds to alpha-2b (ADRA2B) (IC(50)=2.3 nM), alpha-1a (ADRA1A), alpha-1b (ADRA1B), and alpha-2c (ADRA2C) adrenergic receptors. Reversibly binds to M1 (CHRM1) muscarinic acetylcholine receptors, probably by interacting with the orthosteric site (PubMed:7778123, PubMed:12488533, PubMed:24793485). Also reveals a slightly weaker effect at M3 (CHRM3) and M4 (CHRM4) receptors (PubMed:7778123, PubMed:12488533, PubMed:24793485). The order of potency is ADRA2B>>CHRM1>ADRA1A>ADRA1B>ADRA2C/CHRM4 (PubMed:24793485). Expressed by the venom gland. Does not show interaction with adrenergic receptors (ADRA1D, ADRA2A, ADRB1, ADRB2), dopaminergic receptors (DRD1, DRD2, DRD3, DRD4, DRD5), histaminic receptors (HRH1, HRH3, HRH4) and serotoninergic receptors (HTR1A, HTR2A, HTR2B, HTR2C, HTR5A, HTR6, HTR7) (PubMed:21557730, PubMed:24793485). Does not show interaction with muscarinic receptors (CHRM2, CHRM3, CHRM5) (PubMed:7778123, PubMed:12488533, PubMed:24793485). Is classified as a P-type cytotoxin, since a proline residue stands at position 33 (Pro-31 in standard classification). Belongs to the snake three-finger toxin family. Short-chain subfamily. Aminergic toxin sub-subfamily.