895
In vitro kinase assays on isolated microvilli and microvillar fractions enriched in the putative signal transduction particle showed a high specific activity of tyrosine kinase activity compared to that of membranes from EGF receptor - overexpressing A431 cells maximally activated by EGF .
 GENE: tyrosine kinase; GENE: EGF receptor; GENE: EGF
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; GENE: EGF receptor; GENE: EGF