15098
The inversion center was removed by mutating Tyr203 into Phe203 , with minor changes in the linear optical properties and even an improved fluorescence quantum yield .
 Chemical: Tyr203; Chemical: Phe203
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: Tyr203; Chemical: Phe203