6715
We and others have demonstrated that the c - cbl proto - oncogene product is one of the earliest targets of tyrosine phosphorylation upon T cell receptor stimulation .
 c - cbl proto - oncogene product, T cell receptor
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 c - cbl proto - oncogene product, T cell receptor