BCAS4 is a symbol for the gene, Breast carcinoma amplified sequence 4, in humans. Other names include: Breast carcinoma-amplified sequence 4; CNOL. The encoded protein has an amino acid length of 211 and a mass of 22.8 kDa. BCAS4 is a member of the Cappuccino family. This gene shares homology with other species, including: Frog.