25074
We analysed the role of the MBD in MeCP2 - chromatin associations in vivo using an MeCP2 mutant Rett syndrome mouse model ( Mecp2 ( tm ) ( 1 ) ( . ) ( 1 ) ( Jae ) ) in which exon 3 deletion results in an N - terminal truncation of the protein , including most of the MBD .
 N
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 N