Dec 15, 2016 · Prepare fresh, 1 mL per sample. IAM solution: 55 mM iodoacetamide in UABC. Prepare 100 μL per sample. DTT solution: 50 mM DTT in UABC. Prepare 100 μL per sample. Trypsin: MS grade Modified Trypsin, 0.5 μg/μL in 50 mM NH 4 HCO 3 in water. 50ABC: 50 mM NH 4 HCO 3 in water. Prepare 0.5 mL per sample. 25ABC: 25 mM NH 4 HCO 3 in water. Prepare 0