Merck, C3867-1VL, Collagen, Type I solution from rat tail

Collagen is an extracellular matrix protein comprising triple helical structure. The structure of collagen type I, in particular, is characterized by the presence of three identical α-chains in its homotrimetric form. Among these three α-chains, one exhibits slight sequence variation. Type I collagen was first isolated from rat-tail tendon, has two main α chains (α and α ) and one β chain.