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- W2034656884 abstract "Pulsed field gradient gel electrophoresis fractionates chromosome-sized DNA molecules from T. brucei. About 60% of the DNA remains in or close to the gel slot (large DNA). There are about three chromosomes of approximately 2 Mb, at least six chromosomes of 200-700 kb, and roughly a hundred mini-chromosomes of 50-150 kb. The basic copy genes for VSGs 118 and 221 reside in large DNA. Their activation by duplicative transposition leads to the appearance of an additional copy in the 2 Mb DNA, showing that activation involves an interchromosomal gene transposition. When gene 221 is activated without duplication, it remains in large DNA, proving that at least two sites for expression of VSG genes exist. In support of this, the mini-exons encoding the 5' 35 nucleotides of VSG messenger RNAs are in large and 2 Mb DNA. The mini-chromosomes hybridize strongly to VSG gene probes and are absent in C. fasciculata. We suggest that their main function is to provide a large pool of telomeric VSG genes." @default.
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- W2034656884 date "1984-05-01" @default.
- W2034656884 modified "2023-10-03" @default.
- W2034656884 title "Antigenic variation in trypanosoma brucei analyzed by electrophoretic separation of chromosome-sized DNA molecules" @default.
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- W2034656884 doi "https://doi.org/10.1016/0092-8674(84)90302-7" @default.
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