3437
Calcium -dependent immediate-early gene induction in lymphocytes is negatively regulated by p21Ha-ras .
 p21Ha-ras, lymphocytes, immediate-early gene
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:
 p21Ha-ras, lymphocytes, immediate-early gene