Globular proteins are a type of protein that are roughly spherical in shape. They are typically soluble in water and play crucial roles in various biological functions, including enzyme activity, transport, and immune responses. Examples of globular proteins include hemoglobin, which carries oxygen in the blood, and enzymes, which catalyze biochemical reactions. These proteins are composed of long chains of amino acids that fold into specific three-dimensional structures. The folding is essential for their function, as it determines how they interact with other molecules. The unique shapes of globular proteins allow them to perform their specific roles effectively within living organisms.