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We have shown that ElrA and ElrB, Xenopus ELAV homologues, bind the Vg1 mRNA 3′UTR translation element in Xenopus oocytes and implicated ElrB in mediating translational repression during oogenesis. Here we report that, while ElrA and ElrB are 69% identical and both exhibit RNA binding in the nM range, recombinant ElrB, but not ElrA, is able to oligomerise. This oligomerisation is also seen with the...