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Explain how the pKa of an amino acid can differ depending on its chemical environment, either...
how does the protein environment surrounding an amino acid chain affect its chemical properties?Consider the carboxyl...
how does the protein environment surrounding an amino acid chain affect its chemical properties?Consider the carboxyl group on an asparate side chain in the following environments in a protein. Rank in order these environments from the highest to the lowest proportion of carboxyl groups in the -COO- form.that is in terms of pKas. 1. an aspartate side chain on the surface of protein with no other ionizable groups nearby. 2. an aspartate side chain buried in a hydrophobic pocket on...
STRUCTURE WILL VARY DEPENDING IF PKA IS LARGE OR SMALL, Draw a formula for Val-Ser-Gly (V-S-G) in its predominant ionic form at pH 7.3. You may assume for the purposes of this question that the pKa v...
STRUCTURE WILL VARY DEPENDING IF PKA IS LARGE OR SMALL,
Draw a formula for Val-Ser-Gly (V-S-G) in its predominant ionic form at pH 7.3. You may assume for the purposes of this question that the pKa values of the acidic groups of amino acid residues in the peptide are the same as in the amino acid itself. You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. Do not include lone pairs in your...
1. Amino acids are considered to be either hydrophobic or hydrophilic as described by the relative...
1. Amino acids are considered to be either hydrophobic or hydrophilic as described by the relative polarity of their side chain. Consider a folded protein in an aqueous environment; where would the hydrophobic amino acids likely be found? -Tucked away in the middle of the folded protein -Randomly distributed throughout the protein -Exposed on the exterior surface of the folded protein 2. All proteins exhibit a primary, secondary, and tertiary structure, but not all proteins exhibit a quaternary structure. Describe...
1)Match the name of each amino acid with one of its characteristics. 2)has a hydroxy group...
1)Match the name of each amino acid with one of its characteristics. 2)has a hydroxy group its aromatic side chain 3)has a sulfur atom in its side chain that can form disulfide bonds its side chain is a nonpolar isopropyl group 4)it has the smallest acidic side chain 5)this amino acid has the smallest side chain of all, a hydrogen atom 6)its side chain is a methyl group its side chain of 3 carbons forms a 5-membered ring with the...
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with b...
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with bulky side chains while the B-pleated sheets cannot? Select the correct answer below: O The R groups in the a-helix stabilize the structure, while they interfere with the hydrogen bonds in a B-pleated sheet. The R groups are contained inside the a-helix structure, while they interfere with the hydrogen bonds in a B- pleated sheet. O The R groups lie...
Omeprazole has a pKa value of 7.1. Is Omeprazole a weak acid or weak base? Circle...
Omeprazole has a pKa value of 7.1. Is Omeprazole a weak acid or weak base? Circle the acidic or basic functional group in the structure 2. Calculate the percentage of omeprazole in the neutral form (non-ionized) in stomach (pH 1.5) and small intestines (pH 6.5). 3. What would you expect the pKa value of the carboxylic acid group in the derivatized omeprazole? Is the derivatized omeprazole an acid, base or something else? 4. Explain why the omeprazole derivative may have...
Describe the chemical properties of amino acids and discuss how they can affect the final structu...
Describe the chemical properties of amino acids and discuss how they can affect the final structure of a folded protein. In your answer, give examples of amino acid substitutions that could cause changes to a protein’s structure and function
1. what are some of the properties which make water a good environment for chemical reactions...
1. what are some of the properties which make water a good environment for chemical reactions ? 2. What is an acid? Base? What is considered acidic or basic or neutral? Which substance/ compound is neutral? Know the pH scale—what does it tell us, what is it based on (its relation to H+ ion concentration)? It ranges from 0 to 14. Know which points/numbers on the scale are acidic, which are basic, which is neutral. What is the difference in...
questions e-f and g.and k. a) Use the 3 letter symbols for a 6 amino acid...
questions e-f and g.and k.
a) Use the 3 letter symbols for a 6 amino acid peptide chain containing at least one polar and at least one acidic or basic amino acid. (All at physiological pH.) Asp - Gly-Glu-Tyr- Phe- Ala OM b) Draw the primary structure with its peptide bonds, side chains, etc. in the correct order. CH3 NH - E-N -CH. - CH - C- 2-I U=0 -ch- & N-chi- CH₃ CH ₂ Coo CH н My Coo...
For these three oxides, state whether each one is acidic, basic or amphoteric. Explain how cation...
For these three oxides, state whether each one is acidic, basic or amphoteric. Explain how cation oxidation state can be used to help predict acid/base behavior. CrO CrO3 Cr2O3 (a) Briefly explain what amphoterism means; (b) Choose an amphoteric molecular compound and indicate its chemical reaction with an acid and with a base.
STRUCTURE WILL VARY DEPENDING IF PKA IS LARGE OR SMALL,
Draw a formula for Val-Ser-Gly (V-S-G) in its predominant ionic form at pH 7.3. You may assume for the purposes of this question that the pKa values of the acidic groups of amino acid residues in the peptide are the same as in the amino acid itself. You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. Do not include lone pairs in your...
Understand alpha helices and beta pleated sheets Question How is it possible for the a-helix to have amino acids with bulky side chains while the B-pleated sheets cannot? Select the correct answer below: O The R groups in the a-helix stabilize the structure, while they interfere with the hydrogen bonds in a B-pleated sheet. The R groups are contained inside the a-helix structure, while they interfere with the hydrogen bonds in a B- pleated sheet. O The R groups lie...
questions e-f and g.and k.
a) Use the 3 letter symbols for a 6 amino acid peptide chain containing at least one polar and at least one acidic or basic amino acid. (All at physiological pH.) Asp - Gly-Glu-Tyr- Phe- Ala OM b) Draw the primary structure with its peptide bonds, side chains, etc. in the correct order. CH3 NH - E-N -CH. - CH - C- 2-I U=0 -ch- & N-chi- CH₃ CH ₂ Coo CH н My Coo...
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