You have evaluated the theoretical pI of Our Protein Of Interest
(OPOI), based on its amino...
You have evaluated the theoretical pI of Our Protein Of Interest
(OPOI), based on its amino acid sequence, to be 6.4. You select a
working pH of 8.0 and will use what type of ion
exchange?______________________________
Molecular weight: 93910.16 Theoretical pI: 6.03 1.
1. Based on the pI of Taq, what pH buffer would you have to use
to get Taq polymerase to stick to an anion exchanger?
Briefly discuss the advantages and disadvantages of using a salt
or pH in eluting proteins from an ion-exchange column.
Please place details explaining how you arrived to ech answer
for question 1
If you boil a protein in hydrochloric acid it will break down to
its constituent amino acids. Assume that you had done this to a
typical protein and then had spotted these amino acids to a spot on
the chromatograph. What pattern would you expect to see at the end
of the experiment? Explain your prediction.
You have a mixture of the proteins listed below.
Protein
pI
Molecular Weight (kDa)
A
3.1
265
B
6.9
93
C
10.3
96
D
7.1
43
E
8.6
189
1) You load the protein mix onto a cation exchange column at pH
5. Next, you apply a "washing" step by passing
through buffer at pH 5. Finally, for your elution
step, you apply a pH gradient starting from pH 2.0 to pH
13.0. (A gradient buffer system allows you to...
Even if you see ALL OF THE SUBJECTS in our theoretical blood
glucose study have LOWER blood glucose after they take the
medication, does that mean that the blood glucose worked?
What other factors could be influencing a lower blood glucose
among all the participants? Would those factors be confounders?
Effect mediators?
If you had to take into consideration all of those other
factors, would you still do a t test?
You are attempting to purify a protein that has a pI of 9.0 from
a mixture of similarly sized proteins, and have access to different
purification columns. For this protein, you would select as your
first column for purification an:
(a) Anion exchange
(b) Cation exchange
(c) Gel filtration
(d) Heparin sulfate
(e) Ammonium sulfate
You
are provided with the amino acid sequence of an important human
protein that is suspected to be membrane protein. How can you
analyze the amino acid sequence to try to find out more information
on the transmembrane nature of this protein and the region of the
protein that is likely to be in the membrane?
You have to value a company based on its expected future cash
flows. Interest rates are currently 9%. If this company expects
cash flow of $100000 next year (it is the end of year 0 or
equivalently the beginning of the first year), growing at 7.8% each
year until the end of the fifth year. Then, cash flow growth is
expected to slow to 1.9 forever-after. What is the value of this
company today, in thousands of dollars?