Isomin is a constituent of Isotomurus terminal web. (a) Specificity of the anti-isomin polyclonal antibodies: (1) Coomassie-blue staining; (2) immunostaining. A = actin; I = isomin. Electrophoresis on an 8% SDS-polyacrylamide gel. (b, c) Immunofluorescence staining of paraffin-embedded intestine sections. Bars = 20 μm. (d) Immunoelectron microscopy localization of isomin at the terminal web. Bar = 200 nm.