PROS1 and breast carcinoma: transcaucasiana demonstrated significant cytotoxic effects on the triple negative MDA MB 231 breast cancer cells with IC50 of 2.96 μg/mL to 9.22 μg/mL for an Ammodytin I2(A) variant, a Vipoxin chain B or Vaspin basic subunit variant and a cysteine-rich venom protein.