The frequency of gene targeting in Trypanosoma brucei is independent of target site copy number.
We have investigated the effect of target copy number on the efficiency of stable transformation of the protozoan parasite Trypanosoma brucei. Using a single strain of the organism, we targeted integrative vectors to several different genomic sequences, occurring at copy numbers ranging from 1 to approximately 30,000 per diploid genome, and undertook a systematic assessment of both transformation and integration efficiencies. Even over this vast copy number range, frequency of gene targeting ...Expand abstract
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