
Concept explainers
(a1)
To determine: The relation between MRS and ∆G˚ of the binding reaction.
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet lesser. The sweetness is related to their structures and interaction with taste bud receptors. Molar relative sweetness (MRS) is the measure of sweetness of the compound relative to sweetness of sucrose.
(a2)
To determine: Whether the more negative value of ∆G˚ will correspond to a higher or lower MRS.
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet less. The sweetness is related to their structures and taste bud receptors on which the compounds bind. Molar relative sweetness (MRS) is the measure of sweetness of the compound relative to sweetness of sucrose.
(b)
To explain: The uses of predicting the sweetness of molecules by computer model instead of a human or animal-based taste assay.
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet lesser. The sweetness is related to their structures and taste bud receptors. The assay that requires less time to generate valuable result would be convenient and desirable.
(c)
To determine: The AH-B groups in each of the given molecules when the length of a typical single bond is about 0.15 nm
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet lesser. The sweetness is related to their structures and taste bud receptors.
(d)
To determine: The two objections to the statement that molecules containing an AH-B structure will taste sweet are to be determined.
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet lesser. The sweetness is related to their structures and taste bud receptors.
(e)
To determine: The two molecules out of given molecules that can be used to explain the difference in MRS and ∆G˚ and their relation to AH-B model.
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet lesser. The sweetness is related to their structures and taste bud receptors. Molar relative sweetness (MRS) is the measure of sweetness of the compound relative to sweetness of sucrose.
(f)
To determine: The two examples that can be used to argue the AH-B model is unable to explain the observed differences in sweetness.
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet lesser. The sweetness is related to their structures and taste bud receptors. Molar relative sweetness (MRS) is the measure of sweetness of the compound relative to sweetness of sucrose.
(g)
To determine: Whether need to test the model against a different set of molecules from the set it was trained on.
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet lesser. The sweetness is related to their structures and taste bud receptors.
(h)
To determine: The resulting error in MRS values as it has found that the predicted ∆G˚ values for the test set differed from the actual values by, on average, 1.3 kcal/mol.
Introduction: Various compounds taste sweet. Some of them sweet more, while some of them sweet lesser. The sweetness is related to their structures and taste bud receptors. Molar relative sweetness (MRS) is the measure of sweetness of the compound relative to sweetness of sucrose.

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Chapter 1 Solutions
EBK LEHNINGER PRINCIPLES OF BIOCHEMISTR
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- Consider the reaction. kp S P kg What effects are produced by an enzyme on the general reaction? AG for the reaction increases. The rate constant for the reverse reaction (kr) increases. The reaction equilibrium is shifted toward the products. The concentration of the reactants is increased. The activation energy for the reaction is lowered. The formation of the transition state is promoted.arrow_forwardThe graph displays the activities of wild-type and several mutated forms of subtilisin on a logarithmic scale. The mutations are identified as: • The first letter is the one-letter abbreviation for the amino acid being altered. • The number identifies the position of the residue in the primary structure. ⚫ The second letter is the one-letter abbreviation for the amino acid replacing the original one. • Uncat. refers to the estimated rate for the uncatalyzed reaction. Log₁(S-1) Wild type S221A H64A -5 D32A S221A H64A D32A -10 Uncat. How would the activity of a reaction catalyzed by a version of subtilisin with all three residues in the catalytic triad mutated compare to the activity of the uncatalyzed reaction? It would have more activity, because the reaction catalyzed by the triple mutant is approximately three-fold faster than the uncatalyzed reaction. It would have less activity, because the reaction catalyzed by the triple mutant is approximately 1000-fold slower than the…arrow_forwardB Substrate Product AL Product Substrate Reaction progress- Reaction progress- omplete the passage describing the two reactions. In reaction A, the stability of the substrate is (AG) of the reaction is positive, Incorrect Answer greater than the stability of the product. The free-energy change Incorrect Answer so the reaction is considered In reaction B, the stability of the substrate is (AG) of the reaction is less than Incorrect Answer endergonic and Incorrect Answer not spontaneous. Incorrect Answer the stability of the product. The free-energy change negative, so the reaction is considered Incorrect Answer exergonic and spontaneous. Incorrect Answer Incorrect Answerarrow_forward
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