BIOL 240 Chapter Notes - Chapter 5: Type Iv Collagen, Cellular Respiration, Creatine Kinase
Document Summary
Therefore, glycine makes up 33% of collagen structure and therefore is found at every third residue. Because glycine is at every 3rd residue and there is high amounts of proline, the structure is highly-extended alpha chain with a shallow left handed helix. Three collagen chains form this coiled-coil helix with a very tightly packed center. Therefore, glycine is found at every 3rd residue because the side chain of every 3rd residue sticks in towards the center and only glycine (h) could fit there. Aerobic metabolism can therefore occur with this high level of o2 and therefore produce high levels of atp (chemical energy) needed for muscle contraction (mechanical energy). When blood flow stops, the skeletal muscle tissue now relies on phosphocreatine to cleave phosphate group via creatine kinase and donate it to adp to make atp. Therefore, constant atp levels can be maintained because they are being formed at the same time as they are being utilized.
