Figure 2.
hCES1 suppresses the proteome-wide reactivity of probe 4. Ramos cells co-cultured with HEK293T cells expressing hCES1, Met-AP2, or mock-transfected (−) were treated with 3 or 4 (1 μM, 0–24 h). Gel-based ABPP revealed rapid BTK engagement and time-dependent increases in proteome-wide reactivity for both probes, except for 4 in the presence of CES1, where proteome-wide reactivity was blocked.