6081
The kinase inhibitor staurosporine ( 1 microM ) blocks LPA - induced , but not epidermal growth factor - induced , activation of p21ras and MAP kinase , consistent with an intermediate protein kinase linking the LPA receptor to p21ras activation .
 p21ras, MAP kinase, LPA receptor, p21ras
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 p21ras, MAP kinase, LPA receptor, p21ras