4662
The same arrangement of positively and negatively acting sequences has been conserved in the mammalian Pax-2 and Pax-8 , the zebrafish Pax-b as well as the sea urchin Pax-258 proteins .
 sea urchin Pax-258 proteins, zebrafish Pax-b, Pax-8, Pax-2, mammalian Pax-2
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:
 sea urchin Pax-258 proteins, zebrafish Pax-b, Pax-8, Pax-2, mammalian Pax-2