13696
In marked contrast, expression of the dominant interfering deltaDNA-binding domain RXR , containing a deletion of the entire DNA-binding domain , was incompatible with erythroid cell growth in vitro, suggesting a pivotal role of RXR for erythroid cell development .
 RXR, RXR, dominant interfering deltaDNA-binding domain, entire DNA-binding domain
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 RXR, RXR, dominant interfering deltaDNA-binding domain, entire DNA-binding domain