QK3, or QKI, KH domain containing, RNA binding, is a human gene encoded by QKI. It may also be known as: Protein quaking; HqkI; Hqk; QK; QK1. The encoded protein has an amino acid length of 341 and a mass of 37.7 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Rat, Frog, Chicken.