25979
Interestingly , mutating any one of the three lysines prevented the ubiquitin - conjugation to the other two lysines , suggesting that Lys297 , Lys303 and Lys315 may form an optimal structure to interact with ubiquitination machineries .
 Chemical: lysines; Chemical: lysines; 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: lysines; Chemical: lysines; Chemical: Lys297; Chemical: Lys303; Chemical: Lys315