CBY, or Chibby homolog 1 (Drosophila), is a human gene encoded by CBY1. It may also be known as: Protein chibby homolog 1; ARPP-binding protein; Cytosolic leucine-rich protein; PIGEA-14; PKD2 interactor, Golgi and endoplasmic reticulum-associated 1; chibby CTNNB1-mediated transcription inhibitor; C22orf2; HS508I15A; PGEA1; PIGEA14. The encoded protein has an amino acid length of 126 and a mass of 14.5 kDa. Other isoforms may exist. CBY is a member of the Chibby family. Homologs of this gene exist in other organisms, including: Frog.