2049
The MXR gene encodes a half - transporter and the absence of cytogenetic evidence of coamplification of other regions suggests that a partner may not be overexpressed , and instead the MXR half - transporter homodimerizes to mediate drug transport .
 GENE: MXR gene; GENE: MXR half - transporter
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: MXR gene; GENE: MXR half - transporter