30059
Using E . coli cells with a special tRNA / aminoacyl - tRNA synthetase pair , two PPAR alpha variants were prepared , in which Leu - 258 or Phe - 273 were site - specifically replaced by the genetically encoded photo - reactive amino acid para - benzoylphenylalanine ( Bpa ) .
 Chemical: Leu; Chemical: Phe; Chemical: amino acid; Chemical: para - benzoylphenylalanine; Chemical: Bpa
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: Leu; Chemical: Phe; Chemical: amino acid; Chemical: para - benzoylphenylalanine; Chemical: Bpa