DNA mismatch repair protein Mlh1 (MLH1) is involved in the repair of DNA mismatches. MLH1 is part of the BRCA1-associated genome surveillance complex (BASC), which contains BRCA1, MSH2, MSH6, MLH1, ATM, BLM, PMS2 and the RAD50-MRE11-NBS1 protein complex. Defects in MLH1 are the cause of hereditary non-polyposis colorectal cancer type 2, Turcot syndrome, Muir-Torre syndrome, including brain, colorectal, breast and endometrial tumors.The synthetic peptide used to raise the antibody Cat. No. 200167 is selected from a sequence within the C-term region of human MLH1. For blocking experiments, a 10 to 100 fold molar excess to antibody is recommended.