- The tumor suppressor protein APC colocalizes with beta-catenin in the colon epithelial cells. Senda, T., Miyashiro, I., Matsumine, A., Baeg, G.H., Monden, T., Kobayashil, S., Monden, M., Toyoshima, K., Akiyama, T. Biochem. Biophys. Res. Commun. (1996)