27429
Sites that were ineffectively suppressed with the original o - tRNA were better suppressed with an optimized o - tRNA ( o - tRNA ( opt ) ) that was evolved to be better recognized by Ef - Tu .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None