4921
Although they are similar to the IL9R gene ( approximately 90 % identity ) , none of these copies encodes a functional receptor : none of them contains sequences homologous to the 5 ' flanking region or exon 1 of the IL9R gene , and the remaining ORFs have been inactivated by various point mutations and deletions .
 GENE: IL9R gene; GENE: IL9R gene
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: IL9R gene; GENE: IL9R gene