27361
In cells in which Fer was downregulated using siRNA , PDGF - BB was unable to induce phosphorylation of Stat3 , whereas phosphorylations of Stat5 , Erk1 / 2 and Akt were unaffected .
 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