Which protein provides flexibility?

Collagen is a protein that provides flexibility and structural support in various tissues throughout the body, including skin, cartilage, and bones. Its unique triple-helix structure allows it to maintain strength while also being flexible, enabling tissues to withstand stretching and deformation. Additionally, elastin is another protein that contributes to flexibility, particularly in elastic tissues like the lungs, blood vessels, and skin, allowing them to stretch and return to their original shape.