3233
In NIH 3T3 fibroblasts the high affinity IL - 2R bearing a deletion of a region rich in acidic amino acids ( the " acidic " region ) in the IL - 2R beta - chain failed to induce the tyrosine phosphorylation of MAP kinase as well as the expression of the all three nuclear proto - oncogenes .
 GENE: IL - 2R; GENE: IL - 2R beta - chain; GENE: MAP kinase
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: IL - 2R; GENE: IL - 2R beta - chain; GENE: MAP kinase