Final answer:
GPI-anchored proteins are proteins that are attached to the cell membrane through a GPI anchor. Examples include PrPc, CD59, DAF, and alkaline phosphatase.
Step-by-step explanation:
GPI-anchored proteins are a type of proteins that are attached to the cell membrane through a glycosylphosphatidylinositol (GPI) anchor. Examples of GPI-anchored proteins in biology include the normal cellular scrapie protein PrPc, which is involved in prion diseases, as well as various other proteins such as CD59, decay accelerating factor (DAF), and alkaline phosphatase.