3353
Northern blot analyses performed on rat and mouse tissues have detected ubiquitously expressed Pan transcripts, but the abundance, distribution, and form of Pan proteins have not been clearly defined.
 Pan proteins
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:
 Pan proteins