Members of this family assume a structure adopted by most short-chain scorpion toxins, consisting of a cysteine-stabilised alpha/beta scaffold consisting of a short 3-10-helix and a two-stranded antiparallel beta-sheet. They are predominantly found in short-chain scorpion toxins, and their biological method of action has not, as yet, been defined [1].

1: A novel short-chain peptide BmKX from the Chinese scorpion Buthus martensi Karsch, sequencing, gene cloning and structure determination. Wang CG, Cai Z, Lu W, Wu J, Xu Y, Shi Y, Chi CW; Toxicon. 2005;45:309-319. PMID:15683869