11515
Here , staphylokinase ( SAK ) , a thrombolysis agent for therapy of myocardial infarction , was mono - PEGylated at the C - terminus of SAK far from its bioactive domain .
 Chemical: C
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: C