10587
Post - translational modifications of TRF2 such as phosphorylation , ubiquitination , SUMOylation , methylation and poly ( ADP - ribosyl ) ation have been shown to play important roles in telomere function .
 Chemical: ADP
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: ADP