Expression of the Xenopus homologue of the receptor for activated C-kinase1 (RACK1) in the Xenopus embryo

We have isolated the Xenopus homologue of the receptor for activated C-kina se 1 (RACK1), whose amino acid sequence shows significant similarity with o ther vertebrate BACK1s. XRACK1 is a maternally expressed gene and its zygot ic expression is detected in the antero-dorsal region and dorsal midline in the late neurula. At tailbud stage, rather diffuse staining is seen in the somite and head, Later, XRACK1 mRNa is expressed highly in ventrally migra ting abdominal muscle anlagen, where it remains expressed during subsequent stages.