11572
Lactobacillus johnsonii inhibits indoleamine 2 , 3 - dioxygenase and alters tryptophan metabolite levels in BioBreeding rats .
 Chemical: indoleamine; Chemical: tryptophan
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: indoleamine; Chemical: tryptophan