1102
Thus, microtubules participate in intracellular 25(OH)D3 transport , and their integrity determines normal 1,25(OH)2D3 synthesis .
 protein: microtubules
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: microtubules