14104
The features that distinguished these nucleosomes from the bulk of the methylation - insensitive nucleosomes were an increase in the frequency of CpG dinucleotides and a unique rotational orientation of CpGs such that their minor grooves tended to face toward the histones in the nucleosome rather than away .
 Chemical: CpG; Chemical: dinucleotides; Chemical: CpGs
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: CpG, dinucleotides, CpGs 
Answer:
 Chemical: CpG; Chemical: dinucleotides; Chemical: CpGs