MRC1 and colorectal carcinoma: We next analyzed the performance of all mono-markers in the pentaplex PCR assay in both MMR deficient and –proficient CRCs using two approaches: first, using ‘QMVR results alone’ (Figure 2A left panels and Table 3), and second, when data were available from the ‘matching normal DNA from CRC patients’ (Figure 2A, right panels and Table 4).