Latent 70–80 kDa proforms of MMP‐8 could be detected in the samples of periodontally healthy mouths (Figure 1b, lane 1), lower molecular size fragmented (25–35 kDa), and activated forms (40–60 kDa) in the samples from periodontitis patients (Figure 1b, lanes 2–5). The gene discussed is MMP8; the disease is periodontitis.