1610
Mechanism of activation of the vav protooncogene . vav is a human locus that appears to be specifically expressed in cells of hematopoietic origin regardless of their differentiation lineage .
 vav protooncogene, vav
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 vav protooncogene, vav