664
MUC1 - C interacts with EGFR ( epidermal growth factor receptor ) , ErbB2 and other receptor tyrosine kinases at the cell membrane and contributes to activation of the PI3K <E232> AKT and mitogen - activated protein kinase kinase ( MEK ) <E232> extracellular signal - regulated kinase ( ERK ) pathways .
 Chemical: tyrosine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: tyrosine