13392
Although the transmembrane helix and the intracellular module together suffice for constitutive activity even at low densities , the intracellular module is inactivated when tethered on its own to the plasma membrane , and fluorescence cross - correlation shows that it fails to dimerize .
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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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