Description_x000D_ General description_x000D_ Collagen is made of three polypeptide chains. Type 2 collagen is ubiquitously present in the hyaline cartilage. It is a homotrimer made of three α1 chains. Type 2 collagen is also predominant in nucleus pulposus of the vertebral disc and vitreous body of the eye. The proteoglycan obtained from the chicken sternal cartilage is similar to type nine collagen structure._x000D_ Collagen is classified into a number of structurally and genetically distinct types. We use the nomenclature proposed by Bornstein and Traub. Do not confuse Sigma type designations with recognized collagen classification types._x000D_ Application_x000D_ Collagen from chicken sternal cartilage has been used in enzyme–linked immunosorbent assay (ELISA) , chondrocyte-mediated tissue production in vitro, induction, treatment and assessment of collagenα induced arthritis (CIA) and cell proliferation assay._x000D_ Packaging_x000D_ 100 mg in glass bottle_x000D_ 25 mg in poly bottle_x000D_ 5 mg in glass bottle_x000D_ Other Notes_x000D_ Major component of articular cartilage._x000D_ Preparation Note_x000D_ Prepared by a modification of the method of Trentham, D.E., et al.