7985
Recent studies have demonstrated that Cbl , the 120 - kDa protein product of the c - cbl proto - oncogene , serves as a substrate of a number of receptor - coupled tyrosine kinases and forms complexes with SH3 and SH2 domain - containing proteins , pointing to its role in signal transduction .
 Cbl, c - cbl proto - oncogene, receptor - coupled tyrosine kinases, SH3, SH2
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Cbl, c - cbl proto - oncogene, receptor - coupled tyrosine kinases, SH3, SH2