Physico-chemical characterization of Eupsophus vertebralis secretion. A Stress-strain plots for E. vertebralis secretion and three commercial glues (Pritt Stick-Fix ID:4595328, polyvinyl acetate and cyanoacrylate). See details in lap-shear tests assay in the text. B SDS-PAGE of Eupsophus vertebralis secretion samples. Each sample lane represents material from E. vertebralis diluted in acetic acid 5% v/v at 10 mg/µl (Ev) or at 1 mg/µl (Ev1). Marker lanes are indicated (M) and the molecular masses of the standard proteins (kDa) are shown.