4538
We propose that co - ordinated up - regulation of alpha - tubulin acetylation initiates cytoskeleton remodelling by promoting alpha - tubulin severing by katanin which , in turn , allows expansion of lipid droplets and accelerates the morphological transition toward mature adipocytes .
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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:
 None