12148
This study demonstrates that inducible expression in response to either PMA or TPO is mediated through the Ets site in the proximal promoter of GPIX and is dependent upon the upstream activation of MAPK / extracellular signal - regulated kinase .
 TPO, Ets site, GPIX, MAPK, extracellular signal - regulated kinase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 TPO, Ets site, GPIX, MAPK, extracellular signal - regulated kinase