Final answer:
The types of proteins found in a myofiber include contractile, regulatory, and elastic proteins.
Step-by-step explanation:
The proteins found in a myofiber can be categorized into three types:
- Contractile proteins: These are responsible for the actual contraction (shortening) of the muscle. They include the protein actin and the protein myosin.
- Regulatory proteins: These control the cross-bridge formation between actin and myosin. Examples of regulatory proteins are troponin and tropomyosin.
- Elastic proteins: These provide elasticity and help the muscle return to its original shape after contraction. An example of an elastic protein is titin.