17737
At its optimum pH , the thialysine - containing enzyme showed almost 30 % of the activity of the wild - type enzyme at its pH optimum .
 Chemical: thialysine
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: thialysine 
Answer:
 Chemical: thialysine