14837
INTRODUCTION : Janus kinases ( JAKs ) comprise a family of four enzymes , JAK1 , JAK2 , JAK3 and tyrosine kinase 2 ( TYK2 ) , centrally implicated in cell signaling processes important in cancer and immune - inflammatory diseases .
 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