Bacterial plasma membranes are composed of a phospholipid bilayer containing integral or peripheral proteins. The fatty acid components of these phospholipids are ester-linked and are commonly used to identify specific types of bacteria. The membrane proteins perform various functions, including transport, cell-to-cell communication, and sensing environmental conditions.

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The plasma membrane of most bacterial and eukaryotic cells is structured as a bilayer composed primarily of proteins and phospholipids formed with ester linkages. Consistent with the fluid mosaic model, these phospholipid and protein components are highly dynamic, possessing the ability to move laterally within the plane of the membrane as well as between the two phospholipid layers.

Phospholipid Bilayer

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

The cytoskeleton is a structural component of the cell that is positioned as a thin layer of lines just under the inside of the plasma membrane's phospholipid bilayer.

Cytoskeleton

The cell membrane of organisms in the domain Archaea differs from that of bacteria and eukaryotes in three key ways:
1. The membrane phospholipids contain ether linkages, rather than ester linkages.
2. The lipid chains are branched isoprene chains, rather than straight-chained fatty acids.
3. The membrane can exist as a lipid monolayer instead of a lipid bilayer.

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