1774
Ligand - independent activation of platelet - derived growth factor receptor is a necessary intermediate in lysophosphatidic , acid - stimulated mitogenic activity in L cells .
 GENE: platelet - derived growth factor receptor
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: platelet - derived growth factor receptor