During early development, control of the poly(A) tail length by cytoplas-mic polyadenylation is critical for the regulation of specific mRNA expres-sion. Gld2, an atypical poly(A) polymerase, is involved in cytoplasmic polyadenylation inXenopusoocytes. In this study, a new XGld2-interacting protein was identified:XenopusRNA-binding motif protein 9 (XRbm9).