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Biochemical studies and studies of cells expressing mutant IL - 2 receptors indicate that IL - 2 - induced tyrosine kinase activation initiates a complex signaling cascade .
 GENE: IL - 2 receptors; GENE: IL - 2; GENE: tyrosine 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 - 2 receptors; GENE: IL - 2; GENE: tyrosine kinase