Leech salivary gland peptide with unknown function. Expressed in salivary glands. Highly expressed in the head, body and tail with a 2-3-fold higher expression in the head. Does not show effect on voltage-gated calcium channels, potassium channels, and tetrodotoxin-sensitive sodium channels. Does not show activity on Nav1.7/SCN9A, and shows very weak activity on cation channel TRPA1. Belongs to the annelide toxin family.