describe the components of the actin filament. Components of actin filament. short narrative but all components
          Actin G and F
          Troponin
          Tropomyosin 
          Nebulin

Actin G and F

G-actin and F-actin are the two types of actin. G-actin is the dormant globular form, while F-actin is the functional filamentous form. F-actin is a helix-shaped molecule that is long and thin. It is comprised of two G-actin segments that are joined by hydrogen bonds.

Troponin

It is an actin filament constituent that aids in muscular contraction regulation. Troponin is a 3 subunit protein made up of troponin C, troponin T, and troponin I. These components interact with the tropomyosin molecule to control the actin-myosin filament connection, which is required for muscle contraction.

Tropomyosin

It is a protein molecule that assists muscle cells maintain actin filaments. It's a coiled protein that wraps itself around the actin filament and keeps it intact. Tropomyosin also blocks the myosin motor proteins from interacting with the actin filament and generating muscle contraction by obstructing myosin-binding regions on the filament.

Nebulin 

It is extensively produced in muscle tissue and regulates the formation and functioning of the actin thin filament, which plays a key structural role in the thrust mechanism of the muscular sarcomere.