- Yeast cell cycle protein CDC48p shows full-length homology to the mammalian protein VCP and is a member of a protein family involved in secretion, peroxisome formation, and gene expression. Fröhlich, K.U., Fries, H.W., Rüdiger, M., Erdmann, R., Botstein, D., Mecke, D. J. Cell Biol. (1991)