SMG1 and neoplasm: Expression levels for NMD-related factors (UPF1, UPF2, UPF3A, UPF3B, SMG1, SMG2, SMG6, and SMG7) were calculated from microarray-derived datasets of primary tumor samples (n = 40 MSI, n = 48 MSS) and matched normal colon samples (n = 95).