The proteins that comprise the thick and thin filaments are contractile proteins that generate the contractile force of the muscle. What are the other 2 groups of proteins found in muscle and what are their functions?

The other 2 groups of proteins found in muscle are: soluble or sarcoplasmic proteins, extractable with water or diluted saline solutions and are: myoglobin, enzymes and insoluble or connective tissue and organelle proteins.

Explanation:

The primary components of skeletal muscle fibrils are myosin and actin, as well as tropomyosin and troponin associated with actin. Other muscle proteins are essential for regulating the precise spacing, attachment and alignment of myofilaments. Proteins of the muscle are divided into three groups: contractile apparatus or myofibrillar proteins, extractable in its majority with concentrated saline solutions and are: myosin, actin , tropomyosin, troponin, soluble or sarcoplasmic proteins and insoluble or connective tissue and organelle proteins. Soluble proteins make up 25-30% of the total protein in muscle tissue. It consists of about 50 components, essentially enzymes and myoglobin. The high viscosity of the sarcoplasm is due to the high concentration of dissolved proteins, which reaches 20-30%. Myoglobin traps oxygen inside muscle cells so that they produce enough energy for contraction. Sarcoplasm primarily contains the enzymes necessary for glycolysis and the pentose-phosphate cycle. Insoluble proteins make up most of the protein material insoluble both in water and in saline solutions that is a constituent of connective tissue. To it must be added the membrane component and the insoluble portion of the contractile apparatus. Connective tissue contains various types of cells. Also characteristic of this tissue is the large amount of intercellular substance, produced by those same cells, composed of amorphous material (carbohydrates, lipids, proteins) and collagen fibers included in it. Collagen helps give elasticity and strength to muscles.