Chapter 16: Q. 16.40 (page 571)
How is the isoenzyme in the heart different from the isoenzyme in the liver?
The heart's isoenzyme has had only polypeptide subunits, while the liver's isoenzyme comprises only polypeptide subunits.
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Indicate whether each of the following would be a substrate (S) or an enzyme (E): (16.4)
a. glucose
b. hydrolase
c. maleate isomerase
d. alanine
e. amylose
f. lactase
Fetal hemoglobin binds oxygen more tightly than does adult hemoglobin. Why do you think fetal hemoglobin functions differently than adult hemoglobin?
In myoglobin, about one-half of the 153 amino acids have nonpolar groups.
a. Where would you expect those amino acids to be located in the tertiary structure?
b. Where would you expect the polargroups to be in the tertiary structure?
c. Why is myoglobin more soluble in water than silk or wool?
Pepsin, a peptidase that hydrolyzes proteins, functions in the stomach at an optimum How is the rate of a pepsin-catalyzed reaction affected by each of the following conditions?
a. changing the
b. running the reaction at
What type of interaction would you expect between the R groups of the following amino acids in a quaternary structure?
a. phenylalanine and isoleucine
b. glutamate and arginine
c. asparagine and tyrosine
d. alanine and proline
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