5653
Ras - dva was identified as a gene regulated by anterior neural fold protein - 1 / homeobox expressed in embryonic stem cells - 1 , a transcription factor known to be critical in pituitary development , and has an expression profile in the chicken embryonic pituitary gland that is consistent with in vivo regulation by glucocorticoids .
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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