Now, why does my globin observe this behavior? Well, it turns out because it turns out that myoglobin has these properties because it only consists of a single polypeptide chain. Because it consists of only a single chain, it only consists of a single heme group. And what that means is it does not bind oxygen cooperatively. And we'll see exactly what that means in just a moment. So what is the physiological consequence of this property of myoglobin?