β-barrel proteins

β-barrel proteins are a type of protein structure characterized by multiple beta sheets arranged in a circular, barrel-like shape. These proteins often reside in cell membranes, forming channels or pores that regulate the movement of substances in and out of cells or organelles. The barrel structure creates a stable, cylindrical passageway, allowing specific molecules to pass through selectively. β-barrel proteins are essential for processes like nutrient transport, waste removal, and cell communication, and are found in many organisms, including bacteria, mitochondria, and the outer membranes of certain viruses.