Collagen is a fibrous protein which involves interactions between multiple helixes. Ohas a highly flexible secondary structure. is soluble in water. involves interactions between multiple beta-pleated sheets.
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- Describe the primary, secondary, tertiary and quaternary structure of collagen.In myoglobin (above), which level of protein organization includes peptide bonds, hydrogen bonds, ionic bonds, hydrophobic interactions, and van der Waal forces? the primary structure the secondary structure the tertiary structure the quaternary structure all of the aboveCleavage of a phosphate bond is needed for de-polymerization of which mature polymer? Neither microfilaments nor intermediate filaments Microfilaments only Both microfilaments and intermediate filaments Intermediate filaments only
- Both alpha keratin and collagen are fibrous proteins. However, the hydrogen bonding pattern is different between the helices of the respective proteins. What is the major difference?How many amino acids are present on the helix to the right? Any partially drawn amino acids count as one whole amino acid Circle one peptide bond and box one R group on the figure to the right Describe how a lack of Vitamin C in the diet will affect the overall structure of collagen. Figure 6-7 Illustration, Irving Gels. Image from the Irving Geis Collection/Howard Hughes Medical Institute. Rights owned by HHMI. Reproduction by permission only. DrotoincWhich of the following is incorrect about the collagen structure? a. The covalent cross-links between the individual chains stabilize the collagen structure b. None; all the other choices are correct The helical structure is cross-linked (with covalent bonds) at both ends Od. Gly residues are all located in the center of the helix (i.e. between the individual chains) C.
- Collagen is composed of the collagen triple helix containing 1042 amino acids, How long is the collagen triple helix in Angstroms?In collagen, what is the greatest level of protein structure?Which of the following describes an F-actin microfilament? A flexible, helical filament composed of two strands assembled from G-actin 13 protofilaments composed of heterodimers with a hollow core a flexible filament composed of 13 interwoven protofilaments Eight tetramers twisted into a rope-like filament
- All of the following are filamentous proteins EXCEPTMulti-adhesive matrix proteins form adhesive bridges between what type of components or structures? Give an example of such an ECM protein?Many diseases are characterized by fibrosis, which is excess scarring. This scarring is often caused by too much collagen accumulating in the extracellular matrix. Which of the following strategies is MOST likely to work for preventing fibrosis? O Altering the endomembrane system to increase collagen secretion. O Altering the endomembrane system to decrease detection of the internal start transfer sequence of collagen. O Altering the endomembrane system to increase collagen endocytosis. Altering the nuclear export of collagen via lamins, followed by kinesin-mediated exocytosis.