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Education Pays
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What do you want to be when you grow up?
Many possibilities to use your biological education. Biologist Life Scientist Doctor/Nurse BioEngineer Chemical Engineer
YOUR DECISION HAS $$$ CONSEQUENCES!
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Job Growth Growth rate is ~35%/yr
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Salary Information Median Salary for B.S. =$35k/yr Starting Salary ~$24/yr-$30k/yr
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Catalase
The Enzyme
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Using Enzymes in Industry
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Catalase
Liver Enzyme Reaction
decomposition of peroxide
2 H2O2 ----> 2 H2O + O2(g) Catalase acts as a catalyst
increases the rate of reaction
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Rate Plot
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Catalase Enzyme
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Catalase - Tetramer
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Catalase Active Site
Heam Site
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Catalase Mechanism
2 H2O2 <----> 2 H2O + O2(g)
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Catalase Mechanism
tm
ms
ts
WEkVk
kWkK
KS
SVrRate
MentenMichaelis
WkkSk
SWEkkrRate
2max1
12
max
211
21
,
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k1 Fast!! k2 Slow
k1 = Enzyme-Substrate Association
k1 Runs at 4x the Speed Limit, Diffusion Limit
k1 = 4 x 108 Liter/(mole sec)
k2 = Product Kickout from Active Site Much Slower than the Speed Limit Speed limit 1010 1/sec
k2 ~10 1/sec
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Rate Plot
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Hayes’ Data
-0.10
0.00
0.10
0.20
0.30
0.40
0.50
0 0.5 1 1.5 2 2.5
S(mole/liter)
rate
(mol
e/lit
er/m
in)
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Catalase Mechanism
tm
ms
ts
WEkVk
kWkK
KS
SVrRate
MentenMichaelis
WkkSk
SWEkkrRate
2max1
12
max
211
21
,
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Constant Determination
bmxy
VSV
K
SV
KS
rmm
s
maxmaxmax
111
1/(-rs)
1/S
1/Vmax
Slope=Km/Vmax
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Hayes’ DataRate Reduction
0.00
10.00
20.00
30.00
40.00
50.00
60.00
0 0.5 1 1.5 2 2.5
1/S
1/ra
te
Series1
Series2
Series3
Series4
1/Vmax
slope=Km/Vmax
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Effect of Catalase Concentration
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Effect of Temperature
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Effect of pH
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To Do Biology, you need
Chemistry Mathematics
Engineering!