Transmembrane proteins are a class of intrinsic (integral) membrane proteins that completely span the phospholipid bilayer of biological membranes, often functioning as crucial components of cellular transport systems.

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Intrinsic membrane proteins are embedded in the plasma membrane. Transmembrane proteins are a specific type of intrinsic protein that completely span the phospholipid bilayer. They are commonly important in the transport of compounds across the membrane.

Intrinsic Membrane Proteins

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

Protein channels are large membrane proteins that span the entire phospholipid bilayer and have a pore in the center. This pore connects the outside of the cell with the cytoplasm.

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