这关键区别between fluid mosaic model and sandwich model is that流体镶嵌模型指出细胞膜is a fluid磷脂蛋白质是部分或完全嵌入的双层,而三明治模型将细胞膜结构描述为夹在两个蛋白质层之间的脂质层。
有几种模型解释了细胞膜的结构。流体镶嵌模型和三明治模型就是两个这样的模型。流体镶嵌模型宣布大蛋白(糖蛋白) molecules are embedded within the bilayer of phospholipids. It is the most accurate model of the cell membrane. Sandwich model, on the other hand, states that a phospholipid bilayer is sandwiched between two layers of proteins. It was the first model to describe the cell membrane structure.
内容
1。概述和关键差异
2。什么是流体镶嵌模型
3。什么是三明治模型
4。Similarities Between Fluid Mosaic Model and Sandwich Model
5。并排比较 - 表格形式的流体镶嵌模型与三明治模型
6。Summary
什么是流体镶嵌模型?
Fluid mosaic model is the most accurate model that explains the structure of the cell membrane. According to this model, glycoproteins (large protein molecules) are embedded partially or completely in the phospholipid bilayer. This model also includes both integral and peripheral proteins. The mosaic nature of the cell membrane is mainly due to the homogenous distribution of proteins in the lipid bilayer. Apart from phospholipid and proteins, there are carbohydrates molecules on the exterior surface of the cell membrane. They are found bound to either to proteins (forming glycoproteins) or to lipids (forming糖脂)。还有胆固醇分子。
In brief, the fluid mosaic model identifies the cell membrane as a mosaic of phospholipids, cholesterol, proteins, and carbohydrates. G.L. Nicholson and S.L. Singer proposed the fluid mosaic model in 1972.
什么是三明治模型?
三明治模型是第一个模型,解释了the structure of the cell membrane. This model was proposed in 1935 by Hugh Davson and James Danielli. It states that the lipid layer is sandwiched between two protein layers. In simple words, it describes that phospholipid bilayer lies between two layers of globular proteins.
根据三明治模型,细胞膜是三透明和脂蛋白的。有两层蛋白质;一个面对细胞的内部,另一个面对外部环境。因此,根据三明治模型,蛋白质不会跨脂质双层。
流体镶嵌模型和三明治模型之间有什么相似之处?
- 流体镶嵌模型和三明治模型是描述细胞膜结构的两个不同模型。
- 这些模型试图描述蛋白质在细胞膜中的位置。
- 两者都提到存在糖蛋白和磷脂双层。
流体镶嵌模型和三明治模型有什么区别?
流体镶嵌模型是指出大蛋白分子被部分或完全嵌入脂质双层中的模型,而三明治模型将细胞膜结构描述为夹在两个蛋白质层之间的脂质层。因此,这是流体镶嵌模型和三明治模型之间的关键区别。根据流体镶嵌模型,将蛋白质部分或完全嵌入。相反,根据三明治模型,有两层蛋白质,蛋白质层覆盖外表面。G.L. Nicholson和S.L.辛格在1972年提出了流体马赛克模型,而休·戴维森(Hugh Davson)和詹姆斯·丹尼利(James Danielli)于1935年提出了三明治模型。
Below infographic compares both models and lists the differences between fluid mosaic model and sandwich model.
摘要 - 流体镶嵌模型与三明治模型
流体镶嵌模型将质膜描述为磷脂,胆固醇,蛋白质和碳水化合物的镶嵌物。它还描述了蛋白质如何部分或完全嵌入磷脂双层中。这是解释细胞膜结构的最准确模型。三明治模型是描述细胞膜的第一个模型。根据三明治模型,将磷脂双层夹在两个蛋白质层之间。根据三明治模型,蛋白质不会跨越整个膜。因此,这是流体镶嵌模型和三明治模型之间差异的摘要。
参考:
1.“细胞膜和流体镶嵌模型|无限的解剖学和生理学”。Lumenlearning.com,2020年,在这里可用。
图片提供:
1。“Cell membrane detailed diagram en” By LadyofHats Mariana Ruiz – Own work. Image renamed from File:Cell membrane detailed diagram.svg (Public Domain) via下议院维基梅迪亚
2.“”膜摄影” Alejandro Porto - Basada enfotografíatem de Kristen M. Harris,Pi,(CC BY-SA 3.0)通过下议院维基梅迪亚
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