579
Epidermal differentiation and stratification , crucial for barrier formation , are regulated by a complex interplay of transcription factors , including the evolutionarily conserved Grainyhead - like 3 ( Grhl3 / Get1 ) ; Grhl3 - deleted mice exhibit impaired epidermal differentiation and decreased expression of multiple differentiation genes .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None