- The small subunits of human and mouse DNA polymerase epsilon are homologous to the second largest subunit of the yeast Saccharomyces cerevisiae DNA polymerase epsilon. Jokela, M., Mäkiniemi, M., Lehtonen, S., Szpirer, C., Hellman, U., Syväoja, J.E. Nucleic Acids Res. (1998)