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Q: 7. which type of cross-link involves interactions between two cysteine amino acids? 8. Which type of…
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Q: What is the pH of a 0.4 M Alanine solution? Ka1 = 4.53 10-3 Ka2 = 1.36 10-10 (please note…
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Q: Draw the structure for an epsilon-amino carboxylic acid
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Q: 52. An amino acid with a side chain (R group) that contains a -CH₂-OH group would be classified as…
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Q: Which amino acid can participate in electrostatic interactions? "HN- -CH CH "HN-CH- "HN- -CH- CH,…
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Q: Which of the following amino acids is polar acidic? OH CH3 CH, H,N*-C-c-o H,C-CH, H,C CH-C-o H-C-OH…
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Q: acids Identify which of the following are a-amino acids. CH₁ H₂N-C-COOH CH₁ H b. H₂N-C-CH₂-COOH 1…
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Q: Classify this amino acid. H2N –C–COOH H.
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Q: What tertiary interaction would be expected between the following amino acids H2N-CH OH CH2 CH-CH3…
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Q: Which of the following amino acids is naturally occurring? - CH,OH H- ČH,COO- ČH,CH,CO0-
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Q: Neutral Basic Acidic H. NH3 H3C-C-C00 -CH2-CH-C NH3 но arginine Leu OOC-CH2 C-COO NH3 Gln glutamate
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Q: Choose the correct abbreviation for the amino acids in the following structure * II…
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Q: At a pH of 7, what charged groups are present in leucine? O a. NH2+ O b. CO2- O c. NH3+ O d. NH3+…
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A: The physiological pH is 7.4
What is the net charge of the following amino acids (A, B, C, D) at pH 7.30 ?
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- Complete the table for the ionizable groups of the fictitious amino acid hypothetinine. pka (to TWO decimals) Average charge of group when pH=pK (to ONE decimal) Group Ka alpha-carboxyl 1.38 x 103 alpha-amino 6.02 x 10-10Complete the table for the ionizable groups of the fictitious amino acid hypothetinine. Group alpha-amino alpha-carboxyl Ka 5.24 x 10-⁹ 2.13 x 10-3 pKa (to TWO decimals) 8.9 2.7 Average charge of group when pH=pK (to ONE decimal) -0.5 +0.5Choose the structure that best represents the following amino acid at pH = 2. О А O NH3 A ОН ISO NH₂ В ОН NH₂ ОН NH₂ с OH NH3 А D
- given a solution of alanine at pH 9.00, draw the structure of the species present in appreciable quantities and calculate the concentration of each of these species.For the amino acid alanine, the major species in solution at pH 7 is the zwitterionic form, which has a negatively charged carboxylic acid group and a positively charged amino group. There is a less common neutral form in which neither group is charged. The carboxylic acid group of alanine has a p?apKa of 3.3. The amino group of alanine has a p?apKa of 8.8. Estimate the ratio of the concentration of the neutral amino acid species to the zwitterionic species at pH 7.What would the structure and net charge of y- Aminobutyric acid (GABA) be at pH = 1?
- Calculate the pH of a 0.100 M alanine (HL/intermediate form) solution. pKb1 = 4.29 and pKb2 = 11.67.For the amino acid alanine, the major species in solution at pH 7 is the zwitterionic form, which has a negatively charged carboxylic acid group and a positively charged amino group. There is a less common neutral form in which neither group is charged. The carboxylic acid group of alanine has a p?a of 3 The amino group of alanine has a p?a of 8 Estimate the ratio of the concentration of the neutral amino acid species to the zwitterionic species at pH 7. __?__x10^?For the amino acid glutamate, what fraction of the side-chain (R-group) will be ionized at pH = 3.5? At pH = 5.0?
- Draw a structural formula for the major ionic form of the amino acid shown below when in aqueous solution at pH 1.5. HO -CH₂CHCOH *NH3 tyrosineWrite the structural formula (flat projection) of the dipeptide glycyl-phenylalanine (Glycine is the N-terminal residue). What electrical charge will this dipeptide have at pH 7.0?Erythromycin is a weak base with a pka of= 5.2 What will be the ionisation state of the drug in stomach, small intestine and blood? what is the site of absorption of this drug? pH stomach = 1.5, pH blood = 7.4, pH of small intestine is 6.5.