Specific inhibitor of store-operated non-voltage-gated calcium channels (By similarity). Decreases store-operated Ca2+ entry and cytosolic calcium concentration in a dose-dependent manner in U87 cells (PubMed:34946686). Exhibits anti-tumoral activity by inhibiting proliferation of human U87 glioblastoma cells with an IC(50) of 300 ug/mL (PubMed:34946686). Also exhibits anti-tumoral activity towards human glioblastoma U251 cells, but with lower activity (IC(50) estimated to be more than 500 ug/mL) (PubMed:34946686). Has no effect on proliferation of the breast cancer cell line MDA-MB231, colon adenocarcinoma cell line LS174, and liver cancer cell line HepG2 (PubMed:34946686). Does not induce mortality in mice up to 3.5 ug doses (PubMed:34946686). Expressed by venom gland.