In an analysis using two-dimensional gel electrophoresis of the proteins expressed in different cell types, the number of spots that are different in different cells usually exceeds the number of common spots, and even the common spots can still have different intensities. the spots representing which of the following proteins would you expect to be among the common spots when compared across several cell types?
a. rpl10 (a ribosomal protein)
b. hba1 (a hemoglobin subunit)
c. insulin (a hormone)
d. tyrosine aminotransferase (a metabolic enzyme)
e. all of the above

Ithink that the answer is b

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Sink to the bottom. addition of potassium nitrate past it’s dissolution capacity at a particular temperature will cause the extra to just sink to the bottom of the glass.however, if you were to raise the temperature of the solution prior to dissolving it, and then slowly decrease the temperature after the dissolution, you would create a “supersaturated” solution - a solution that has more solute dissolved into it than should be allowed. if you add any extra solute past this, the entire solution would “crystallize,” and this is how you get those cool videos on youtube.