Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to myosin storage myopathy ?
    ### Response:
    Mutations in the MYH7 gene cause myosin storage myopathy. The MYH7 gene provides instructions for making a protein known as the cardiac beta ()-myosin heavy chain. This protein is found in heart (cardiac) muscle and in type I skeletal muscle fibers, one of two types of fibers that make up the muscles that the body uses for movement.
    