10365
Post - translational modification of bacterial elongation factor P ( EF - P ) with ( R ) - beta - lysine at a conserved lysine residue activates the protein in vivo and increases puromycin reactivity of the ribosome in vitro .
 Chemical: ( R ) - beta - lysine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: ( R ) - beta - lysine