6859
Human MN / CA9 gene , a novel member of the carbonic anhydrase family : structure and exon to protein domain relationships .
 Human MN / CA9 gene, carbonic anhydrase family
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Human MN / CA9 gene, carbonic anhydrase family