1335
The novel hematopoietic growth factor FLT3 ligand ( FL ) is the cognate ligand for the FLT3 , tyrosine kinase receptor ( R ) , also referred to as FLK - 2 and STK - 1 .
 GENE: hematopoietic growth factor FLT3 ligand; GENE: FL; GENE: FLT3; GENE: tyrosine kinase receptor; GENE: R; GENE: FLK - 2; GENE: STK - 1
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: hematopoietic growth factor FLT3 ligand; GENE: FL; GENE: FLT3; GENE: tyrosine kinase receptor; GENE: R; GENE: FLK - 2; GENE: STK - 1