5658
A reporter construct driven by 4 kb of the chicken ras - dva 5 ' - flanking region , containing six putative pituitary - specific transcription factor - 1 ( Pit - 1 ) binding sites and two potential glucocorticoid receptor ( GR ) binding sites , was highly activated in embryonic pituitary cells and up - regulated by corticosterone .
 Chemical: corticosterone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: corticosterone