2215
On the other hand , transfection of ERK1 siRNA / ERK2 siRNA or CREB siRNA at a higher concentration is sufficient to down - regulate PIAS1 expression .
 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