25978
Further dissecting each lysine within this mutant , we identified Lys297 , Lys303 and Lys315 being the ubiquitin - conjugation sites .
 Chemical: lysine; Chemical: Lys297; Chemical: Lys303; Chemical: Lys315
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: lysine; Chemical: Lys297; Chemical: Lys303; Chemical: Lys315