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We have studied the CREB - ATF - adiponectin network in rabbit preimplantation development in vivo and in vitro . From the blastocyst stage onwards CREB and ATF1 , 3 and 4 are present with increasing expression for CREB , ATF1 and 3 during gastrulation and with a dominant expression in the embryoblast ( EB ) .
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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:
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