Probable toxin with unknown function. In contrast to similar toxins, this toxin does not inhibit voltage-gated potassium channels (tested at 100 nM). Does not show antimicrobial activities against bacteria and yeasts. The 52-Leu-Pro-53 bond exists only in the trans-isomerization. Has no effect on hKv1.1/KCNA1, hKv1.2/KCNA2, hKv1.3/KCNA3, hKv11.1/KCNH2/ERG1, hKCa1.1/KCNMA1, hKCa3.1/KCNN4, and hNav1.4/SCN4A (when tested at 100 nM). Belongs to the sea anemone type 1 potassium channel toxin family. Type 1b subfamily.