1744
The program for myogenic differentiation is subject to negative control by several peptide growth factors and by the products of mutationally activated ras oncogenes , which persistently activate intracellular cascades normally triggered by specific growth factors .
 GENE: ras oncogenes
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: ras oncogenes