PMS2 and neoplasm: MuAt feature principal components associated with driver mutations in the MMR gene  PMS2 (q=1.28\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\times 10^{-6}$$\end{document}×10-6, Additional file 1: Table S4), as well as with the fraction of microsatellites with somatic mutations (Additional file 1: Table S6), a measure for the level of MSI in a tumour.