CHEK2 and ovarian carcinoma: Proteins involved in homologous recombination repair other than BRCA1 and BRCA2, including ATM, CHEK2, BARD1, BRIP1, MRE11, RAD50, NBS1, RAD51C, RAD51D, and PALB2, have been reported to be associated with increased susceptibility to ovarian cancer.