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(A) Chemical structure of DNP-linker (DL) series; (B) flow cytometry analysis of B. subtilis cells incubated overnight with 1 mM dipeptide 4, 50 μM DNP-linker, and Alexa Fluor 488 anti-DNP IgG antibody displaying an increase in opsonization. Data are represented as the mean ± SD (n = 3).
