6640
Using reference probes as internal standards , we show that the ost transcription unit is located within the cytogenetic band interval 89A1 , 2 on the right arm of the third chromosome , and that it exerts diagnostic segmentation gene expression patterns in the embryo .
 ost transcription unit
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 ost transcription unit