2383
After 6 months of exposure , the expression of mitofusin - 1 ( Mfn1 ) , fission - 1 ( Fis1 ) , and dynamin - related protein - 1 ( Drp1 ) at both the protein and mRNA levels were detected by Western blotting , immunohistochemistry , and real - time PCR , respectively .
 None
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