CPEB, or Cytoplasmic polyadenylation element binding protein 1, is a human gene encoded by CPEB1. It may also be known as: Cytoplasmic polyadenylation element-binding protein 1; CPE-BP1; CPE-binding protein 1; h-CPEB; hCPEB-1-1. The encoded protein has an amino acid length of 566 and a mass of 62.6 kDa. CPEB is a member of the RRM CPEB family. Homologs of this gene exist in other organisms, including: Mouse, Frog.