5171
The absence of other regions of hybridization suggests that there are no closely related sequences ( e . g . , reverse transcribed pseudogenes ) scattered throughout the genome and that if there are closely related genes , they must be clustered near GSTT2 .
 GSTT2
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 GSTT2