28657
About 10 years ago we first reported that tetracyclines inhibited the aggregation of prion protein fragments and Alzheimer ' s beta peptides , destabilizing their aggregates and promoting their degradation by proteases .
 Chemical: tetracyclines
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: tetracyclines