Label the different components of the actin filament in the diagram given below.

(N/A) The actin filament (thin filament) is composed of three main protein components:
$1$. $F$-actin: These are two filamentous actin helices that form the backbone of the filament.
$2$. Tropomyosin: These are two strands of tropomyosin protein that run close to the $F$-actin throughout its length.
$3$. Troponin: These are complex proteins distributed at regular intervals on the tropomyosin.