8724
We demonstrate that the PHD1 - PHD2 region is essential for viability and that the first PHD finger contributes to the preferred binding of PHD1 - PHD2 to lysine 4 - methylated histone H3 tails .
 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