Figure

Different functions of integral membrane proteins. The six major categories of integral membrane proteins are shown in this diagram. These are pumps, channels, receptors, linkers, enzymes, and structural proteins. These categories are not mutually exclusive. A structural membrane protein involved in cell-to-cell junctions might simultaneously serve as receptor, enzyme, linker, or any combination of these functions.

cell membrane collagen IV

enzymes

K+o pumps receptors structural proteins

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