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. 2007 Nov 19;179(4):627–633. doi: 10.1083/jcb.200705062

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Copyright © 2007, The Rockefeller University Press

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Figure 1. — Interaction of M protein with lipid membrane, monitored by patch clamp admittance measurements. (A) Changes of the admittance (ΔIm and ΔRe) and ionic permeability (G_dc) of the patch connected to the membrane reservoir upon application of 2 μM of M protein. Level 1 shows the background level of ΔIm corresponding to the initial area of the patch. ΔIm deviations back and forth to level 1 indicate reversible changes of the patch area, and each single alteration (e.g., around level 2) indicates a budding event. (B) Expanded selection from black box in A. Transient increase in ΔRe (arrow) indicates formation of a thin membrane neck. (C) Cumulative distribution of the values of ΔIm jumps and the corresponding diameters of the spherical membrane particle. The initial part of the distribution (up to ∼1.3 fF) is expanded to show a Gaussian-like profile. (D) Left histogram shows the distribution of small ΔIm jumps from C; right histogram shows the distribution of ΔIm jumps obtained at elevated (5 μM) concentration of M protein.