20843
In this study , we investigated the effects of increased endogenous activin bioactivity on hepatic nutrient homeostasis by creating mice with inactivating mutations that deplete the circulating activin antagonists , follistatin like - 3 ( FSTL3 ) or the follistatin 315 isoform ( FST315 ; FST288 - only mice ) .
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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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