2724
Also , the BALB / c gene contains a single substitution in a conserved octamer sequence approximately equal to 100 nucleotides upstream of the coding region , which could affect its expression .
 GENE: BALB / c gene
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: BALB / c gene 
Answer:
 GENE: BALB / c gene