11730
SIP1 ( Smad interacting protein 1 ) and deltaEF1 ( delta - crystallin enhancer binding factor ) are structurally similar transcriptional repressors .
 SIP1, Smad interacting protein 1, deltaEF1, delta - crystallin enhancer binding factor
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 SIP1, Smad interacting protein 1, deltaEF1, delta - crystallin enhancer binding factor