1578
Most of the expressed human E3 polypeptides ( five bands ) were found in the insoluble pellet while primarily full - length mature E3 was found in the soluble fraction .
 human E3 polypeptides, full - length mature E3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 human E3 polypeptides, full - length mature E3