24045
BpyAla predominated when selections were carried out at lower pH , consistent with the differential pKa ' s of histidine and BpyAla .
 Chemical: BpyAla; Chemical: histidine; Chemical: BpyAla
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: BpyAla; Chemical: histidine; Chemical: BpyAla