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Fig. 6. The XNIF localization element interacts with Vg1RBP and Prrp in
co-immunoprecipitation experiments. lacZ-RNA, XNIF-LE (nt 252-551) as
well as XNIF nt 252-381, XNIF nt252-381 in a tandem repeat (nt 252-381-tr) and
Vg1-LE are radioactively labeled by in-vitro transcription. Vg1RBP, Prrp,
VgRBP71 and L5 were produced by coupled transcription and translation in the
TNT reticulocyte lysate system and incubated with radiolabeled
RNAs. RNPs were immunoprecipitated by the myc-epitope and unbound RNA from the
supernatant (sup.) and coprecipitated (bound) RNAs were analyzed by denaturing
PAGE. Different labeled RNAs are marked on the left-hand side; in-vitro
translated proteins are indicated on the top panel.