Dual-function toxin that inhibits 85% of the activity of trypsin at a molar ratio of 4:1 with a dissociation constant of 760 nM, and that inhibits mKv1.3/KCNA3 potassium channel currents, but very weakly. Expressed by the venom gland. Has no effect on chymotrypsin and elastase. Belongs to the venom Kunitz-type family. Scorpion delta-Ktx subfamily. Delta-Ktx 1 sub-subfamily.