Protein with unknown function. Expressed by the venom gland. The recombinant protein does not show activity on Kv1.1/KCNA1, Kv1.2/KCNA2, Kv1.3/KCNA3, Kv2.1/KCNB1 and Kv4.3/KCND3 channels, as well as calcium (Cav) and sodium channels (Nav). It also does not show detectable activity against chymotrypsin, trypsin kallikrein, and thrombin. Belongs to the venom Kunitz-type family. 03 (sub-Kunitz) subfamily.