11390
Whereas the role of mammalian thioredoxin ( Trx ) as an intracellular protein cofactor is widely appreciated , its function in the extracellular environment is not well - understood .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None