11606
Binding of cell type - specific nuclear proteins to the 5 ' - flanking region of maize C4 phosphoenolpyruvate carboxylase gene confers its differential transcription in mesophyll cells .
 maize C4 phosphoenolpyruvate carboxylase gene
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 maize C4 phosphoenolpyruvate carboxylase gene