p23_NUDCD1: p23-like NUD (nuclear distribution) C-like domain found in human NUD (nuclear distribution) C domain-containing protein 1, NUDCD1 (also known as CML66), and similar proteins. NUDCD1/CML66 is a broadly immunogenic tumor associated antigen, which is highly expressed in a variety of solid tumors and in leukemias. In normal tissues high expression of NUDCD1/CML66 is limited to testis and heart.