Refer to the table below containing data collected from experiments using chloroplasts isolated from leaves taken from living spinach plants.In the experiments, measurements were taken of the catalytic activity of the enzyme sedoheptulose bisphosphatase (SBP), which operates in the part of the Calvin cycle that regenerates ribulose 1,5-bisphosphate (RuBP).The chloroplasts were broken open using a blender, and the resulting mixture was centrifuged and the pellet discarded.The enzyme SBP was present in the supernatant and could be assayed by adding its substrates and measuring how much product was formed from the reaction it catalyzed.Depending on additional treatments listed in the table, the catalytic activity of SBP varied as shown. 
What do the data suggest about the role of ferredoxin and thioredoxin in the function of this enzyme? Explain your reasoning.
Definitions:
The Mean
A statistical measure representing the average value in a set of numbers, calculated by dividing the sum of all values by the number of values.
The Median
A statistical measure representing the middle value in a given set of numbers, where half the numbers are above and half are below this value.
Control Variable
A control variable is a factor that is kept constant to accurately assess the relationship between other variables in a research study.
Television Viewing
The act or practice of watching television content, which can influence individual behaviors, opinions, and cultural trends.
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