5192
The deduced amino acid sequences of each of the W3A1 ETF subunits exhibit only approximately 30 % identity with the corresponding subunits of the ETF from human , rat , and Paracoccus denitrificans , which as a group are greater than 50 % identical .
 W3A1 ETF subunits, ETF
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 W3A1 ETF subunits, ETF