4695
Ligand binding of multi - chain antigen receptors and hematopoietin / cytokine receptors results in rapid activation of protein tyrosine kinase ( PTK ) - dependent signalling molecules such as phosphatidylinositol 3 - kinase ( PI 3 - kinase ) .
 GENE: hematopoietin; GENE: protein tyrosine kinase; GENE: PTK; GENE: phosphatidylinositol 3 - kinase; GENE: PI 3 - 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: hematopoietin; GENE: protein tyrosine kinase; GENE: PTK; GENE: phosphatidylinositol 3 - kinase; GENE: PI 3 - kinase