1954
In contrast to the reciprocal effects of Gab1 and Gab2 in mediating Elk - 1 induction , these two molecules have a similar function in extracellular signal - regulated kinase activation induced by either oncogenic Ras or growth factor stimulation .
 GENE: Gab1; GENE: Gab2; GENE: Elk - 1; GENE: extracellular signal - regulated kinase; GENE: Ras
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: Gab1; GENE: Gab2; GENE: Elk - 1; GENE: extracellular signal - regulated kinase; GENE: Ras