Plasma membranes across different cell types contain unique phospholipids characterized by specific fatty acid compositions. Phospholipid-derived fatty acid analysis (PLFA) is a biochemical technique that utilizes these specific profiles to identify distinct types of cells, as archaea, bacteria, and eukaryotes each possess a unique PLFA signature.

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Has a fatty acid in the form of a tail, glycerol head, and a phosphate group. Phospholipids behave uniquely in an aqueous environment they are said to be amphipathic meaning that they have both a hydrophilic head water loving which interacts within the aqueous environment of the cell membrane and a hydrophobic tail water fearing which interacts with the interior of the cell membrane away from the aqueous environment.

Phospholipids

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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.

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Phosphoinositides are a class of phospholipids that are formed from phosphatidylinositol.  Seven types of phosphoinositides exist:

- phosphatidylinositol 3-phosphate (PI3P)
- phosphatidylinositol 4-phosphate (PI4P)
- phosphatidylinositol 5-phosphate (PI5P)
- phosphatidylinositol 4,5-bisphosphate (PI4,5P2)
- phosphatidylinositol 3,5-bisphosphate (PI3,5P2)
- phosphatidylinositol 3,4-bisphosphate (PI3,4P2)
- phosphatidylinositol 3,4,5-trisphosphate (PIP3)

These molecules collectively make up less than 1% of all lipids, but they function as important mediators of cell growth and development as well as membrane signaling and trafficking.  

Phosphoinositides

The amphipathic nature of phospholipids enables them to form uniquely functional structures in aqueous environments. These structures include:

- Micelles
- Lipid bilayer sheets (unit membranes)

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