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. __________ is a globular protein of 6 kDa consisting of 51 amino acids arranged in 2 polypeptide chains held together by a disulphide bridge
- a)Fibrinogen
- b)Keratin
- c)Insulin
- d)Glucagon
Correct answer is option 'C'. Can you explain this answer?
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.__________ is a globular protein of 6 kDa consisting of 51 amino acid...
In proteins, only right-handed helices are observed. This means that the helical structures in proteins have a specific orientation and twist.
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.__________ is a globular protein of 6 kDa consisting of 51 amino acid...
Human insulin is a peptide hormone composed of 51 ammo acids and has a molecular weight of 5805 Da.(∼6 Kda). In this molecule, there are two polypeptide chains (A and B) held together by disulphide bridge.
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.__________ is a globular protein of 6 kDa consisting of 51 amino acid...
Types of Helices in Proteins
Right-handed helices:
- The most common type of helix observed in proteins is the right-handed helix.
- In proteins, the right-handed helix takes the form of an alpha helix, which is a common secondary structure.
- The alpha helix is stabilized by hydrogen bonds between the carbonyl oxygen of one amino acid residue and the amide hydrogen of an amino acid residue four residues down the sequence.
Left-handed helices:
- Left-handed helices are less commonly observed in proteins compared to right-handed helices.
- One example of a left-handed helix in proteins is the collagen triple helix, which is a secondary structure found in collagen fibers.
- The left-handed collagen triple helix is characterized by a repeating Gly-X-Y sequence, where X and Y are often proline and hydroxyproline.
Conclusion:
In summary, while both left and right-handed helices can be observed in proteins, the most common type is the right-handed helix, particularly in the form of the alpha helix. Left-handed helices, such as the collagen triple helix, are less common but still play important structural roles in certain proteins.
Right-handed helices:
- The most common type of helix observed in proteins is the right-handed helix.
- In proteins, the right-handed helix takes the form of an alpha helix, which is a common secondary structure.
- The alpha helix is stabilized by hydrogen bonds between the carbonyl oxygen of one amino acid residue and the amide hydrogen of an amino acid residue four residues down the sequence.
Left-handed helices:
- Left-handed helices are less commonly observed in proteins compared to right-handed helices.
- One example of a left-handed helix in proteins is the collagen triple helix, which is a secondary structure found in collagen fibers.
- The left-handed collagen triple helix is characterized by a repeating Gly-X-Y sequence, where X and Y are often proline and hydroxyproline.
Conclusion:
In summary, while both left and right-handed helices can be observed in proteins, the most common type is the right-handed helix, particularly in the form of the alpha helix. Left-handed helices, such as the collagen triple helix, are less common but still play important structural roles in certain proteins.
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.__________ is a globular protein of 6 kDa consisting of 51 amino acids arranged in 2 polypeptide chains held together by a disulphide bridgea)Fibrinogenb)Keratinc)Insulind)GlucagonCorrect answer is option 'C'. Can you explain this answer?
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