10976
STK40 is a putative serine / threonine kinase and was shown to induce extraembryonic endoderm differentiation from mouse embryonic stem cells .
 Chemical: serine; Chemical: threonine
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: serine; Chemical: threonine