3744
Taken together , we demonstrate a redox - mediated activation of PKA by PDGF - BB thus highlighting a physiological role of ROS as regulator of PKA activity in rat mesangial cells .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None