1509
As with duplication of the entire TK / CAIN region ( exons 18 - 26 ) in A - 172 cells , duplication of exons 18 - 25 is associated with a specific genomic rearrangement between flanking introns .
 A - 172 cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 A - 172 cells