1826
Chick brain actin depolymerizing factor ( ADF ) is a 19 - kDa protein that severs actin filaments and binds actin monomers .
 Chick brain actin depolymerizing factor, ADF, actin filaments, actin monomers
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Chick brain actin depolymerizing factor, ADF, actin filaments, actin monomers