1. Proteins that are firmly associated with the membrane and require detergents to separate are? A...
1. Proteins that are firmly associated with the membrane and require detergents to separate are?
A continuous stretch of more than 20 hydrophobic amino acids in a protein may indicate what sort of feature on that protein?
Homework Answers
In this case, we are trying to isolate a membrane protein. Specifically, an integral protein. In fact, it is required the complete solubilization and disruption of the membrane.
A continuous stretch of more than 20 hydrophobic amino acids in a protein may indicate what sort of feature on that protein? This means that these residues are non polar (not attracted to water) and the protein is an integral protein.
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1. Proteins that are firmly associated with the membrane and
require detergents to separate are?
A...
SDS-PAGE is often used to determine the location and orientation of membrane associated proteins. Commonly, experimental...
SDS-PAGE is often used to determine the location and orientation of membrane associated proteins. Commonly, experimental preparations of membranes are treated in a variety of ways in order to extract the proteins, which are then subjected to SDS-PAGE. These treatments will affect membrane proteins in different ways, based on how they are arranged in the membrane. One of the most common pre-treatments is by the digestive enzyme trypsin, which degrades polypeptide chains. Trypsin is too large to cross a membrane,...
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Show and discuss one example of each of each of these protein classes: 1) Membrane Proteins,...
Show and discuss one example of each of each of these protein classes: 1) Membrane Proteins, 2) Receptors, 3) Carrier Proteins. Here, elucidate the protein structure and function. So, what structural features of the protein allow it to function in this protein class capacity? (e.g. alpha helices are a common feature among many membrane proteins that allow them to respond to different external signals)
QUESTION 1 To study how proteins fold, scientists must be able to purify the protein of...
QUESTION 1 To study how proteins fold, scientists must be able to purify the protein of interest, use solvents like urea to denature the folded protein, and observe the process of refolding at successive time points. What is the effect of the solvents used in the denaturation process? a. The solvents break all noncovalent interactions. b. The solvents break all covalent interactions. c. The solvents create a new folded conformation. d. The solvents break some of the noncovalent interactions, resulting...
1.histones are proteins that make up nucleosomes. they bind to the backbone of DNA in chromosomes....
1.histones are proteins that make up nucleosomes. they bind to the backbone of DNA in chromosomes. A majority of the residues in these proteins must be ___ for this to occur a) hydrophobic b) neg charged c)hydrophilic and neutral d)pos charged e)cytseines 2. the stability of a protein secondary structure is mostly due to a) the hydrogen bonding between the amide groups within the backbone of the protein b) the attraction for water molecules by hydrophobic amino acid residues c)...
Question 1 1 pts Which of the following is the most common property of membrane lipids?...
Question 1 1 pts Which of the following is the most common property of membrane lipids? O a. They contain two hydrophobic tails. ob. They are sphingolipids. O c. They are amphipathic. O d. They are phospholipids. Question 2 1 pts Which of the following is most likely to contain a region of 20 hydrophobic amino acids? a. A peripheral membrane protein. b. A transmembrane protein. O c. A GPI-anchored protein. O d. A cytosolic protein. Question 3 1 pts...
Question 1 (0.5 points) Saved Proteins are formed by joining together. carboxylic acids fatty acids amino...
Question 1 (0.5 points) Saved Proteins are formed by joining together. carboxylic acids fatty acids amino acids none of the above Question 2 (0.5 points) Which two functional groups does an amino acid contain? amine and carboxylic acid carboxylic acid and amide amide and heterocyclic ring heterocyclic ring and amine Question 3 (0.5 points) Do amino acids commonly exist in nature as neutral molecules with all uncharged atoms? Yes No Question 1 (0.5 points) What is a protein? A polymer...
1. Amino acids are considered to be either hydrophobic or hydrophilic as described by the relative...
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3) Antibodies can be membrane-bound or secreted, depending on whether a stretch of additional amino acids...
3) Antibodies can be membrane-bound or secreted, depending on whether a stretch of additional amino acids are present or not. What process do you think determines if these amino acids are present? postranslational covalent attachment of a membrane spanning domain to the antibody alternative RNA splicing phosphorylation polyadenylation ubiquitin addition 10) How does the Cas9 system target where it produces a double-strand break in the DNA? The Cas9 protein binds to a recombinase, allowing it to disable the gene of...
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SDS-PAGE is often used to determine the location and orientation of membrane associated proteins. Commonly, experimental preparations of membranes are treated in a variety of ways in order to extract the proteins, which are then subjected to SDS-PAGE. These treatments will affect membrane proteins in different ways, based on how they are arranged in the membrane. One of the most common pre-treatments is by the digestive enzyme trypsin, which degrades polypeptide chains. Trypsin is too large to cross a membrane,...
Question 1 1 pts Which of the following must be true of integral membrane transport proteins in prokaryotes? O They are composed of more than one protein They require ATP or another high-energy molecule They use proton-motive force for transport They are ABC transport systems They are amphipathic Question 2 1 pts DNA hybridization techniques, such as FISH, require the melting and re-annealing of DNA to its original form. What chemical feature of DNA allows for this to occur? Planarity...
Question 1 1 pts Which of the following is the most common property of membrane lipids? O a. They contain two hydrophobic tails. ob. They are sphingolipids. O c. They are amphipathic. O d. They are phospholipids. Question 2 1 pts Which of the following is most likely to contain a region of 20 hydrophobic amino acids? a. A peripheral membrane protein. b. A transmembrane protein. O c. A GPI-anchored protein. O d. A cytosolic protein. Question 3 1 pts...
Question 1 (0.5 points) Saved Proteins are formed by joining together. carboxylic acids fatty acids amino acids none of the above Question 2 (0.5 points) Which two functional groups does an amino acid contain? amine and carboxylic acid carboxylic acid and amide amide and heterocyclic ring heterocyclic ring and amine Question 3 (0.5 points) Do amino acids commonly exist in nature as neutral molecules with all uncharged atoms? Yes No Question 1 (0.5 points) What is a protein? A polymer...
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