3336
Because the wa - 2 mutation was mapped previously to the vicinity of the EGF / TGF - alpha receptor ( EGFR ) gene on mouse chromosome 11 , we hypothesized that the wa - 2 phenotype might result from a defect in either the expression or activity of EGFR , or both .
 GENE: wa - 2 mutation; GENE: EGF / TGF - alpha receptor; GENE: EGFR; GENE: wa - 2 phenotype; GENE: EGFR
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: wa - 2 mutation; GENE: EGF / TGF - alpha receptor; GENE: EGFR; GENE: wa - 2 phenotype; GENE: EGFR