4403
We have previously cloned and characterized the murine homologue of the Huntington disease ( HD ) gene and shown that it maps to mouse chromosome 5 within a region of conserved synteny with human chromosome 4p16 .
 Huntington disease, HD
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Huntington disease, HD