8262
As the dityrosine yield is too low to account for the observed cross - linking , we propose that aggregation is associated with tryptophan oxidation and Trp - derived cross - links .
 Chemical: dityrosine; Chemical: tryptophan; Chemical: Trp
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: dityrosine; Chemical: tryptophan; Chemical: Trp