9483
In MCF7 cells , PRL ( 2 . 5 ) polyplex produced 3 or 223 times higher gene expression than PLL or RPLL polyplexes , respectively .
 polyplex, PLL, polyplexes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 polyplex, PLL, polyplexes