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The BLM N-terminus is important for topoisomerase IIIα interaction. (A) Aliquots of 0, 100, 200 and 400 ng full-length BLM, an N-terminal truncation (BLMΔN) and BSA were blotted on a nitrocellulose membrane and probed against the indicated radiolabelled proteins obtained in an in vitro coupled transcription/translation system as indicated in Materials and Methods. (B) SDS–PAGE electrophoresis analysis of the radiolabelled proteins used for the assay.
