Recently a Researcher Has Discovered Several Unidentified Proteins (UPS-1 Through

Multiple Choice

Recently a researcher has discovered several unidentified proteins (UPS-1 through UPS-3) that are up regulated (produced in higher levels) by the cell in response to the inclusion of high levels of an artificial sweetener called "sugarish".The research ran a PAGE gel of the protein samples after the cells were treated with different concentrations of "sugarish" (0-5 nm) .One sample was also treated with the detergent SDS.The results are shown below.Which of the following are possible conclusions given these results and the knowledge you have gained from this chapter?
(I) UPS-1 functions as a dimer.
(II) UPS-1 interacts with UPS-2.
(III) UPS-1 interacts with UPS-3.
(IV) UPS-2 interacts with UPS-3.

A) I,II,III,IV
B) II,III,IV
C) I,II
D) I,III
E) II,III