General, Organic, & Biological Chemistry
3rd Edition
ISBN: 9780073511245
Author: Janice Gorzynski Smith Dr.
Publisher: McGraw-Hill Education
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Chapter 21.2, Problem 21.2P
Draw both enantiomers of each amino acid in Fischer projections and label them as D or L: (a) phenylalanine; (b) methionine.
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Draw both enantiomers of each amino acid and label them as D or L: (a) methionine; (b) asparagine
(iv) Re-draw the amino acid below in a Fischer projection.
H2N
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Net charge and isoelectric point of an amino acid with an ionizable side group.Consider the net charge and isoelectric point of an amino acid with ionizable side (R-) group.(a) Identify the acidic amino acid(s) capable of having a negatively charged carboxyl side group.(b) Identify the basic amino acid(s) capable of having a positively charged amino side group.(c) For an amino acid with a side (R-) chain that can ionize to a negative charge, derive a general expression in terms of measured pH and known pKa values of α-carboxyla-amino (pKca), α-amino(pKaa),and side group (pKRa), respectively, for the net charge of an amino acid Consider the net charge and isoelectric point of an amino acid with ionizable side (R-) group.(d) For an amino acid with a side (R-) chain that can ionize to a positive charge, derive a general expression in terms of measured pH and known pKa values ofα-carboxyl (pKca), α-amino (pKaa), and side group (pKRa), respectively, for the net charge of the amino acid.(e)…
Chapter 21 Solutions
General, Organic, & Biological Chemistry
Ch. 21.2 - In addition to the amino and carboxyl groups, what...Ch. 21.2 - Draw both enantiomers of each amino acid in...Ch. 21.2 - Prob. 21.3PCh. 21.3 - Draw the structure of the amino acid valine at...Ch. 21.3 - Identify the amino acid shown with all uncharged...Ch. 21.4 - Identify the N-terminal and C-terminal amino acid...Ch. 21.4 - Prob. 21.7PCh. 21.4 - Prob. 21.8PCh. 21.4 - Prob. 21.9PCh. 21.4 - Prob. 21.10P
Ch. 21.4 - Prob. 21.11PCh. 21.5 - Prob. 21.12PCh. 21.6 - Prob. 21.13PCh. 21.6 - Prob. 21.14PCh. 21.6 - Prob. 21.15PCh. 21.7 - Why is hemoglobin more water soluble than ...Ch. 21.8 - Prob. 21.17PCh. 21.8 - Prob. 21.18PCh. 21.9 - Prob. 21.19PCh. 21.9 - Prob. 21.20PCh. 21.9 - Prob. 21.21PCh. 21.9 - Prob. 21.22PCh. 21.10 - Prob. 21.23PCh. 21.10 - Prob. 21.24PCh. 21.10 - Prob. 21.25PCh. 21.10 - Prob. 21.26PCh. 21.10 - Prob. 21.27PCh. 21.10 - Prob. 21.28PCh. 21.10 - Prob. 21.29PCh. 21.11 - Prob. 21.30PCh. 21 - The amino acid alanine is a solid at room...Ch. 21 - Why is phenylalanine water soluble but...Ch. 21 - Draw the structure of a naturally occurring amino...Ch. 21 - Draw the structure of a naturally occurring amino...Ch. 21 - For each amino acid: [1] draw the L enantiomer in...Ch. 21 - For each amino acid: [1] draw the L enantiomer in...Ch. 21 - Draw both enantiomers of each amino acid and label...Ch. 21 - Which of the following Fischer projections...Ch. 21 - For each amino acid: [1] give the name; [2] give...Ch. 21 - For each amino acid: [1] give the name; [2] give...Ch. 21 - (a) Identify the amino acid shown with all...Ch. 21 - Prob. 21.42PCh. 21 - Prob. 21.43PCh. 21 - Draw the structure of the neutral, positively...Ch. 21 - Prob. 21.45PCh. 21 - Prob. 21.46PCh. 21 - (a) Draw the structure of the two possible...Ch. 21 - Prob. 21.48PCh. 21 - Prob. 21.49PCh. 21 - For each tripeptide: [1] draw the structure of the...Ch. 21 - Prob. 21.51PCh. 21 - For each tripeptide: [1] identify the amino acids...Ch. 21 - Prob. 21.53PCh. 21 - Prob. 21.54PCh. 21 - Prob. 21.55PCh. 21 - Prob. 21.56PCh. 21 - Prob. 21.57PCh. 21 - Prob. 21.58PCh. 21 - Prob. 21.59PCh. 21 - Prob. 21.60PCh. 21 - Prob. 21.61PCh. 21 - Prob. 21.62PCh. 21 - What type of intermolecular forces exist between...Ch. 21 - What type of interaction occur at each of the...Ch. 21 - Prob. 21.65PCh. 21 - Draw the structures of the amino acids tyrosine...Ch. 21 - Prob. 21.67PCh. 21 - Prob. 21.68PCh. 21 - Prob. 21.69PCh. 21 - Prob. 21.70PCh. 21 - Prob. 21.71PCh. 21 - Hydrogen bonding stabilizes both the secondary and...Ch. 21 - Prob. 21.73PCh. 21 - Prob. 21.74PCh. 21 - Prob. 21.75PCh. 21 - Prob. 21.76PCh. 21 - What class of enzyme catalyzes each of the...Ch. 21 - What class of enzyme catalyzes each of the...Ch. 21 - Prob. 21.79PCh. 21 - Prob. 21.80PCh. 21 - Prob. 21.81PCh. 21 - What kind of reaction is catalyzed by each of the...Ch. 21 - Prob. 21.83PCh. 21 - How will each of the following changes affect the...Ch. 21 - Prob. 21.85PCh. 21 - Prob. 21.86PCh. 21 - Prob. 21.87PCh. 21 - Prob. 21.88PCh. 21 - Prob. 21.89PCh. 21 - Prob. 21.90PCh. 21 - Prob. 21.91PCh. 21 - Prob. 21.92PCh. 21 - Why must vegetarian diets be carefully balanced?Ch. 21 - Prob. 21.94PCh. 21 - Sometimes an incision is cauterized (burned) to...Ch. 21 - Why is insulin administered by injection instead...Ch. 21 - Prob. 21.97PCh. 21 - The silk produced by a silkworm is a protein with...Ch. 21 - Explain the difference in the mechanism of action...Ch. 21 - Prob. 21.100PCh. 21 - Prob. 21.101CPCh. 21 - Suggest a reason for the following observation....
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- 2. Classify the following amino acids as nonpolar, polar basic, polar acidic, or polar neutral. (a) (b) (c) (d) H₂N-CH-COH CH-OH I CH3 || H₂N-CH-C-OH I CH₂ C=O 1 OH H₂N-CH-C-OH CH₂ T CH-CH3 CH₂ H₂N-CH-C-OH ī CH₂ OH 229arrow_forwardQ1. Eticlopride is a dopamine antagonist, which can block dopamine receptor sites and influence levels of dopamine. The molecule is involved in a number of intermolecular interactions with amino acids in the G protein-coupled receptor. о но ČI Eticlopride i) Draw a suitable diagram to indicate where the following amino acids might interact with the molecule: phenylalanine; valine; histidine; tyrosine. In your answer, please draw the amino acids and show the interaction. ii) For each interaction you have shown, state the nature of that interaction (e.g. H- bonding, pi-pi etc.)arrow_forwardAssign an R or S configuration to the chiral center in each amino acid. (a) l-Phenylalanine (b) l-Glutamic acid (c) l-Methioninearrow_forward
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