The protein that is particularly important for muscle growth is called "myosin." Myosin is a motor protein that plays a major role in muscle contraction and movement by interacting with actin filaments. Additionally, other proteins such as actin and troponin are also involved in muscle function. Dietary proteins like whey, casein, and soy are often recommended for muscle repair and growth in conjunction with resistance training. These proteins provide the necessary amino acids that facilitate muscle hypertrophy, making them crucial for athletes and anyone engaged in physical exercise.