3740
To evaluate whether ROS dependent dimerization of PKA also occurs in a more physiological setting , rat mesangial cells were treated with platelet - derived growth factor - BB ( PDGF - BB ) to induce ROS formation .
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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