4700
When linked to the herpes simplex thymidine kinase minimal promoter , this fragment acts as an enhancing element in Rcho but not GC cells .
 GENE: thymidine 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: thymidine kinase