Recombinant protein inhibits the adhesion of alpha-1/beta-1-K562 (ITGA1/ITGB1) cells to collagen IV with an IC(50) of 80 nM. Monomer. Expressed by the venom gland. Two conformers are found, they may differ by their disulfide bond connectivities. Conformer 2 is 33 times less active than conformer 1. Conformer 2 may represent a non-native protein (PubMed:16215260). The C-terminal dipeptide may be post-translationally removed, as seen in disintegrins that possess a KTS integrin-binding motif. Does not show inhibitory activity toward alpha-IIb/beta-3 (ITGA2B/ITGB3), alpha-V/beta-3 (ITGAV/ITGB3), alpha-2/beta-1 (ITGA2/ITGB1), alpha-5/beta-1 (ITGA5/ITGB1), alpha-4/beta-1 (ITGA4/ITGB1), alpha-6/beta-1 (ITGA6/ITGB1), and alpha-9/beta-1 (ITGA9/ITGB1). Belongs to the disintegrin family. Short disintegrin subfamily. The mature sequence shown is shorter than the sequence proposed in PubMed:16215260 and PubMed:21656569. A comparison of jerdostatin with KTS-disintegrins and a higher potency (IC(50) of 80 nM compared to 180 nM) suggest that the C-terminal dipeptide is post-translationally removed.