Normal colon epithelium biopsies were obtained from screening colonoscopies performed at Vanderbilt University IRB approval #061096. Sixty pinch biopsies were obtained from both ascending and descending colon from 30 subjects with completely normal findings during colonoscopy. Protein lysates were digested and fractionated using bRP-HPLC resulting in 15 fractions. RAW files and files searched using MS-GF+ are included (Zhang et al. Nature 2014; 513:382-7)