2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/20157We present a self-dual bending theory that may enable a better understanding of highly nonlinear global behavior observed in biological vesicles. Adopting this topological approach for spherical vesicles of revolution allows us to describe them as frustrated sine-Gordon kinks. Finally, to illustrate an application of our results, we consider a spherical vesicle globally distorted by two polar latex beads.10 pages, 3 figures, LaTeX2e+IOPartSoft Condensed MatterPattern Formation and SolitonsQuantitative Methodstext