Hernández-Zapata Ernesto, Martínez-Balbuena Luciano, Santamaría-Holek Iván
Departamento de Física, Matemáticas e Ingeniería, Universidad de Sonora, C.P. 83600, H. Caborca, Sonora, México.
J Biol Phys. 2009 Aug;35(3):297-308. doi: 10.1007/s10867-009-9169-5. Epub 2009 Jun 25.
We propose a free energy expression accounting for the formation of spherical vesicles from planar lipid membranes and derive a Fokker-Planck equation for the probability distribution describing the dynamics of vesicle formation. We find that formation may occur as an activated process for small membranes and as a transport process for sufficiently large membranes. We give explicit expressions for the transition rates and the characteristic time of vesicle formation in terms of the relevant physical parameters.
我们提出了一种自由能表达式,用于解释从平面脂质膜形成球形囊泡的过程,并推导了一个福克 - 普朗克方程,用于描述囊泡形成动力学的概率分布。我们发现,对于小膜,形成过程可能是一个活化过程,而对于足够大的膜,则是一个输运过程。我们根据相关物理参数给出了囊泡形成的跃迁速率和特征时间的明确表达式。