8956
Our results suggest that the crucial role of the mutations activating v - erbA as an oncogene is to ' freeze ' c - ErbA / TRalpha in its non - liganded , repressive conformation and to facilitate its overexpression .
 v - erbA, c - ErbA, TRalpha
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 v - erbA, c - ErbA, TRalpha