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These proteins are permanently attached within the plasma membrane. They perform various functions including transporting ions or molecules across the membrane.
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These proteins are not embedded within the lipid bilayer, but are loosely attached to the outer or inner surface of the membrane.
Transmembrane Protein: A type of integral protein that spans the entirety of the biological membrane to which it is permanently attached.
Specialized integral proteins that form pores for passive transport of ions or molecules across the cell's membrane.