| Source | Australian funnel Web spider |
|---|---|
| Amino acids | NECIRKWLSCVDRKNDCCEGLECWKRRGNKSSVCVPIT |
| Target | ASCI1 |
| Family | Inhibitor cysteine knot |
Hc3a is a peptide from the venom of the Australian funnel web spider, which slows down desensitisation of the acid-sensing sodium channel ASIC1a.