Getting to Know the Functions of Small Numbers

Abstract

Many types of proteins are at work inside our bodies. These proteins include so-called molecular motors, which harness chemical energy from sources such as ATP to generate force and torque. For example, molecular motors called myosins generate force that causes muscles, the heart, and blood vessels to contract. Failure of these molecular motors to function normally is known to trigger heart and muscle disorders; thus, molecular motors are crucial for maintaining normal function in our bodies. This chapter is in the form of a conversation between two students: the individualistic Koki Beoka, who loves weight training; and an upperclassman named Tsukasa. Their conversation will help you to understand how myosins function when they congregate into a group, as well as the biological significance of these functions.