3624
Actinin - 4 knockdown keratinocytes lack polarity , assemble multiple lamellipodia with a 2 x increased area over controls , display reduced activity of the actin remodeling protein cofilin , and fail to migrate in a directional manner .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None