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(January 2009). A membrane transport protein (or simply transporter) is a membrane protein involved in the movement of ions, small molecules, or macromolecules, such as another protein, across a biological membrane.January 2009). A membrane transport protein (or simply transporter) is a membrane protein involved in the movement of ions, small molecules, or macromolecules, such as another protein, across a biological membrane.
1.1 Why are proteins important to us Proteins make up about 15% of the mass of the average person. Protein molecules are essential to us in an enormous variety of different ways.Much of the fabric of our body is constructed from protein molecules..1 Why are proteins important to us Proteins make up about 15% of the mass of the average person. Protein molecules are essential to us in an enormous variety of different ways.