Tư liệu về enzim

Figure 6.10 Enzyme and Substrate
Figure 6.11 Enzymes Lower the Energy Barrier
Figure 6.22 pH Affects Enzyme Activity
Figure 6.23 Temperature Affects Enzyme Activity
Over the Energy Barrier
Figure 6.12 Life at the Active Site
Figure 6.14 Some Enzymes Change Shape When Substrate Binds to Them
Figure 6.18 Reversible Inhibition (Part 1)
Figure 6.19 Allosteric Regulation of Enzymes
Allosteric Activation
allosteric activator
vacant
allosteric binding site
active site altered, can bind substrate
active site cannot bind substrate
enzyme active site
Figure 6.15a
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Allosteric Inhibition
allosteric inhibitor
allosteric binding site vacant; active site can bind substrate
active site altered, can’t bind substrate
Figure 6.15b
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Feedback Inhibition



enzyme 2
enzyme 3
enzyme 4
enzyme 5
enzyme 1
SUBSTRATE
END PRODUCT (tryptophan)
A cellular change, caused by a
specific activity, shuts down the
activity that brought it about
Figure 6.16
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