Membranes & Transport - FMM (Part 2) | BIALIGY.com

About this video

• Video Title: Membranes & Transport - FMM (Part 2) | BIALIGY.com
• Channel: BIALIGY
• Speakers: None explicitly named
• Duration: 00:09:39

Overview

This video explains the "mosaic" aspect of the fluid mosaic model of cell membranes, focusing on the role and types of proteins within the membrane. It details peripheral and integral proteins, their amphipathic nature, and how their placement contributes to the membrane's mosaic pattern and lateral movement capabilities.

Key takeaways

• Mosaic Portion of the Model: The "mosaic" aspect refers to the proteins embedded within or attached to the phospholipid bilayer, creating a patterned structure.
• Amphipathic Proteins: Proteins in the cell membrane are amphipathic, meaning they have both polar and non-polar components, allowing them to interact with both the watery environment and the lipid tails.
• Peripheral Proteins: These proteins are not embedded in the membrane but are found on its surface. They are generally hydrophilic.
• Integral Proteins: These proteins are deeply inserted into the membrane and can span the entire membrane (transmembrane proteins). They are typically hydrophobic due to their interaction with the lipid tails.
• Protein Movement: Proteins can move laterally (side-to-side) within the membrane, contributing to its fluidity. However, they cannot "flip-flop" (move from one side to the other) due to the unfavorable chemical interactions this would create with the hydrophilic and hydrophobic regions.