1819
A 2.3-kb LCR in the human adenosine deaminase (ADA) gene first intron , which controls expression in thymocytes , is composed of a 200-bp enhancer domain and extended flanking sequences that facilitate activation from within chromatin .
 DNA: chromatin; protein: 2.3-kb LCR; DNA: 200-bp enhancer domain; cell type: thymocytes; DNA: human adenosine deaminase (ADA) gene first intron; DNA: human adenosine deaminase (ADA) gene
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: chromatin; protein: 2.3-kb LCR; DNA: 200-bp enhancer domain; cell type: thymocytes; DNA: human adenosine deaminase (ADA) gene first intron; DNA: human adenosine deaminase (ADA) gene