8681
Here , we leveraged protein engineering to modify the PK characteristics of the native molecule by fusing FST315 to a murine IgG ( 1 ) Fc and removing the intrinsic heparan sulfate - binding activity of follistatin .
 Chemical: sulfate
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: sulfate