Respuesta :
A g protein-coupled receptor has been activated by ligand binding. III - the alpha subunit component activates the target protein.
Protein
Proteins are vital nutrients for the body of an individual. They can be used as fuel and are one of the building components of body tissue. Proteins have an energy density of 4 kcal (17 kJ) per gram, which is equal to that of carbohydrates. Lipids, on the other hand, have an energy density of 9 kcal (37 kJ) per gram.
From a nutritional perspective, the composition of amino acids in a protein is the most crucial factor and defining property. Peptide bonds hold the chains of amino acids that make up proteins together. During human digestion, hydrochloric acid and protease activity in the stomach break down proteins into smaller polypeptide chains. This is critical for the body's inability to biosynthesize the vital amino acids that must be absorbed.
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