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Apoptosis-related intrinsic pathway gene expression in the PBMC of the (a-c) P and NP groups without stimuli and under (d-f) P. gingivalis HmuY protein stimulation. (a, d) BAK1 (BCL2-antagonist/killer 1); (b, e) CASP9 (caspase 9); (c, f) APAF1 (apoptotic peptidase activating factor-1). ∗∗p = 0.01, ††p = 0.05, and §p < 0.1.
