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Activation of tyrosine kinase - containing receptors , heterotrimeric G proteins , and protein kinase C enhanced the activities of both MEK isoforms in 293 and PC12 cells .
 GENE: tyrosine kinase - containing receptors; GENE: heterotrimeric G proteins; GENE: protein kinase C; GENE: MEK isoforms
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: tyrosine kinase - containing receptors; GENE: heterotrimeric G proteins; GENE: protein kinase C; GENE: MEK isoforms