13655
Leucine / isoleucine side chain polymers are of interest due to their hydrophobicity and reported role in the formation of alpha - helical structures .
 Chemical: Leucine; Chemical: isoleucine
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: Leucine; Chemical: isoleucine