You isolate a cellular structure and determine that it is composed of α-tubulin and β-tubulin. Based on this evidence, you correctly identify this structure as a(n) :

A) structural MAP
B) microfilament
C) microtubule
D) actin filament
E) myosin filament

α-Tubulin

A protein that is a fundamental component of microtubules, which are structural elements of cells involved in various cellular processes including mitosis and intracellular transport.

β-Tubulin

A protein that is a fundamental building block of microtubules, which are structural components of the cytoskeleton in cells and are involved in cellular processes like division and motility.

Microtubule

Tubular structures within the cytoplasm of cells, important for a variety of functions including cell division and intracellular transport.