1420
Sequence analysis of the isolated genomic clone revealed that the DNA binding domain of this orphan receptor is most homologous to the human TR2 receptor .
 GENE: human TR2 receptor
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: human TR2 receptor