Changes

[[File:QMSection2.8.png|thumb|'''Fig. 2.8 Molecular structure of collagen in a tendon, diagrammatic''']]

[[File:QMSection2.8.png|thumb|'''Fig. 2.8 Molecular structure of collagen in a tendon, diagrammatic''']]

===''The significance of collagen'''===

===''The significance of collagen''===

   

   

The fibrous elastomer collagen is by far the most predominant passive supporting substance in vertebrates.  20% of the protein of a mouse is collagen.  Tendon, ligament and dermis are almost pure collagen, and it is a major constituent of bone and fibrocartilage.  Few tissues lack it entirely.  Collagen quality is of commercial interest because it determines the tenderness and appropriate cooking methods of different muscles, at different stages of growth.   

The fibrous elastomer collagen is by far the most predominant passive supporting substance in vertebrates.  20% of the protein of a mouse is collagen.  Tendon, ligament and dermis are almost pure collagen, and it is a major constituent of bone and fibrocartilage.  Few tissues lack it entirely.  Collagen quality is of commercial interest because it determines the tenderness and appropriate cooking methods of different muscles, at different stages of growth.