21854
We have applied the amber stop codon / suppressor tRNA strategy to the production of histone H4 acetylated at lysine 16 , a particularly important isoform of this histone .
 Chemical: lysine
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