Alpha-helix: Difference between revisions
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The alpha helix is the most common helix found in nature. It consists of a coiled polypeptide chain, in which the side chains of the amino acids extend outward from the core, this allows it to maintain its shape. They can be found in many different types of proteins, from globular proteins, such as myoglobin to keratin, which is a fibrous protein. Both these are prodominantly alpha helical in structure. The strength of the helix is determined by the number of disulphide bonds between the different turns of the helix. | The alpha helix is the most common helix found in nature. It consists of a coiled polypeptide chain, in which the side chains of the amino acids extend outward from the core, this allows it to maintain its shape. They can be found in many different types of proteins, from globular proteins, such as myoglobin to keratin, which is a fibrous protein. Both these are prodominantly alpha helical in structure. The strength of the helix is determined by the number of disulphide bonds between the different turns of the helix. | ||
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=== References === | |||
=== References === | |||
Champe, Pamela C. <u><span id="1289825025738S" style="display: none"> </span>Biochemistry</u>, 4th Edition. United States of America, Lippincott Williams &Wilkins, 2008. | Champe, Pamela C. <u><span id="1289825025738S" style="display: none"> </span>Biochemistry</u>, 4th Edition. United States of America, Lippincott Williams &Wilkins, 2008. | ||
Revision as of 12:47, 15 November 2010
The alpha helix is the most common helix found in nature. It consists of a coiled polypeptide chain, in which the side chains of the amino acids extend outward from the core, this allows it to maintain its shape. They can be found in many different types of proteins, from globular proteins, such as myoglobin to keratin, which is a fibrous protein. Both these are prodominantly alpha helical in structure. The strength of the helix is determined by the number of disulphide bonds between the different turns of the helix.
References
Champe, Pamela C. Biochemistry, 4th Edition. United States of America, Lippincott Williams &Wilkins, 2008.