Following incubation, caspase 3 activity was measured using the fluorogenic substrate AC-DEVD-AMC as described before ( 2 , 1.2 mM EGTA, 1.5% Nonidet P40, 0.3% CHAPS, 30% sucrose, 150 M caspase 3 substrate DEVD-AMC, 30 mM DTT, and 3.0 mM PMSF was directly added to HepG2 cells
doi:10.1111/j.1742-4658.2008.06743.x
doi: 10.1023/A:1007059010571 180 KregelKCStaussHUngerT
& Piggott, M
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However, our approach is a significant advance on these earlier methods, for the following reasons: snap-freezing of samples followed by reaction with IAM-TPP/IAM enables us to trap and stablise all reactive sulfur species simultaneously through their nucleophilic reactions to generate stable products, rather than leaving labile moieties that may be modified during sample workup