Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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what is the difference between a ligand and a domain? I understand they both attach with proteins but how do u identify which is which? Also, what is the difference between the function of the two?
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- Let’s suppose we have downloaded the structure of Hemoglobin from PDB. Now we want to retrieve the location of helices and loops in it. How can we do it? How can we depict a protein’s coordinate info in a modeling program? (Subject: Bioinformatics)arrow_forwardA sample of an unknown peptide was divided into two aliquots. One aliquot was treated with trypsin and the other was treated with cyanogen bromide. Given the following sequences (N-terminal to C-terminal) of the resulting fragments, deduce the sequence of the original peptide. Trypsin treatment Asn—Tyr—Asp—Met—Phe—Ala—Arg Asp—Trp—Asn—Arg Gln—Met—Tyr—Cys—Pro—Ile—Arg Gln—Cys Cyanogen bromide treatment Tyr—Cys—Pro—Ile—Arg—Asn—Tyr—Asp—Met Asp—Trp—Asn—Arg—Gln—Met Phe—Ala—Arg—Gln—Cysarrow_forwardSmall molecules are used as inhibitors of protein action - as drugs. They most often do this by blocking the active site within the protein. Potential drugs can be screened computationally to determine if they are strongly bound to the protein. Figure 1 shows a possible conformation of a candidate drug molecule, 4-bromo-2- carboxymethylamide-pyrrole (abbreviation: BCMAP) at the active site of a protein (abbreviation: PR). Figure 2 shows the full protein structure whilst figure 3 shows a known inhibitor of the protein at the site, overlayed with another calculated conformer of BCMAP. (a) Explain what types of interactions, both intermolecular and intramolecular, that a molecular mechanics forcefield must be able to describe in order to be able to accurately determine the geometry of BCMAP in the protein. Identify which interactions will be the most important to describe accurately. Figure 1.4-bromo-2-carboxymethylamide-pyrrole (BCMAP) (C, N, O, and Br atoms in yellow, blue, red, and…arrow_forward
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- What general structural feature is shared by proteins that specifically form homodimers (but not homotrimers, homoteramers etc)? Only one answer is correct. the surface consists of hydrophilic alpha-helix. the surface is highly modified by post-translational modification. the surface is permanently bound by chaperones. the surface is unstructured. the surface, or part of it, is self-complementary.arrow_forwardPreviously Protein A and 5mM of ligand X were combined in a neutral solution and 36% of Protein A was ligand bound. Now Protein A and ligand X are combined in an acidic solution. You now find that when there’s a 4 mM concentration of free ligand X, 45% of the protein is bound to ligand. How does a change in pH affect protein A’s affinity for ligand X? a. Protein A has a higher affinity for ligand X in acidic environments b. Protein A has a lower affinity for ligand X in acidic environments c. The solution pH does not affect the affinity of protein A for ligand X. d. The solution pH does not affect the affinity of a protein for a ligand.arrow_forward
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