3518
Here we aimed at investigating their effects on the structural rearrangements of the M ( 1 ) Rs between the active and quiescent states , using the fluorescence resonance energy transfer ( FRET ) technique .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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