Snake venom serine protease that hydrolyzes specific chromogenic substrate S-2302 suggesting that AHP-Ka is a plasma kallikrein. Has esterase activity on alpha-N-benzoyl-L-arginine ethyl ester hydrochloride (BAEE) and amidolytic activity. Inhibited by PMSF, Fe(3+), Fe(2+), Cu(2+), Cd(2+), Mn(2+), and Al(3+). Not inhibited by Ca(2+) and Mg(2+) and EDTA. Optimum pH is 7-8. Optimum temperature is 30-40 degrees Celsius. Monomer. Expressed by the venom gland. N-glycosylated. Cleavage of N-glycans reduces the catalytic enzymatic efficiency. Belongs to the peptidase S1 family. Snake venom subfamily.