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Protein Purification

Protein Purification
Which of the following may be added to stabilize the protein after yeast cells disruption?

All of these
NaCl
AMP
Protease inhibitor

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Protein Purification
A purified protein sample contains 10 μg of protein and has an enzyme activity of 1 m mole of ATP synthesized/sec (1 unit). What is the specific activity of the final purified sample?

100,000 units/mg
1,000 units/mg
10,000 units/mg.
1,000,000 units/mg

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Protein Purification
Gel-filtration chromatography separates on the basis of

size and shape using porous beads packed in a column
shape using porous beads packed in a column
size using porous beads packed in a column
None of these

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Protein Purification
Affinity chromatography deals with the

protein - protein interaction
None of these
specific binding of a protein constituents for another molecule
protein - carbohydrate interaction

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Protein Purification
During successful purification scheme, this may be expected that the

number of proteins in the sample decreases
specific activity increases
both (a) and (c)
specific activity decreases

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Protein Purification
The best way to determine the location of protein in the purification scheme is to measure the

UV absorption
mass spectroscopy of the protein
changes in the refractive index
rate of ATP synthesis

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