PCNA and colorectal cancer: Mitosis (Ask, Birc5, Bcra1, Cdc2, Cdk4, Chek1, Mad2l1, Mif, Plk1), DNA mismatch repair (Hgmb1, Msh2, Pcna, Rev1l, Xrcc5), cell transformation (Cdc37, Id2, Myc), cell proliferation (Ctnnb1, Pcna, Plat, Plk1, Rala, Top2a), colorectal cancer (Birc5, Brca1, Cdc37, Myc, Top53), IGF-1 signaling (Igf1, Igfb4, Mapk1, Prkc, Ptpn11), Wnt signaling (Csnk1a1, Csnk2a1, Ctnnb1, Gs3kb, Myc, Nlk, Tcf3, Tcf4)