What is elastin similar to in structure?

Elastin is a key protein found in connective tissues, characterized by its ability to stretch and return to its original shape, which makes it pivotal for maintaining the elasticity of various tissues in the body, such as skin, lungs, and blood vessels. Its structure is similar to collagen because both elastin and collagen are fibrous proteins that provide strength and support to tissues. They are both integral components of the extracellular matrix, giving tissues their structural integrity.

While collagen is known for its tensile strength and forming a supportive framework, elastin’s unique ability to stretch and recoil complements collagen's strength. This combination is crucial for maintaining the flexibility and resilience of skin and other tissues that experience various forces and movements. Understanding this similarity helps in recognizing how these proteins work together in maintaining the physical properties of our tissues.