Pulling tethers from adhered vesicles |
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Authors: | Smith Ana-Suncana Sackmann Erich Seifert Udo |
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Institution: | E 22 Institut für Biophysik, Technische Universit?t München, D-85748 Garching, Germany. |
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Abstract: | The competition between adhesion and tether formation in bound vesicles is investigated. A theoretical model is developed in which tethers are induced by the application of a pulling force to the top of a strongly adhered vesicle. A critical onset force is identified where the tether spontaneously appears as part of a first order shape transition. Further growth of the tether initiates a detachment process that culminates in a continuous unbinding of the vesicle at a finite detachment force. Both critical forces, as well as all shape parameters, are calculated as a function of the reduced volume and the strength of adhesive potential. |
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