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Therefore , in order to search for the latent genes , we used allotype - specific oligonucleotides for b5 , b6 and b9 to probe DNAs from both normal and T . brucei - infected rabbits by Southern blotting .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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