Mucin-2 and Submaxillary gland androgen-regulated protein 3B are associated with periodontal diseases since the first provides a protective, lubricating barrier against particles and infectious agents at mucosal surfaces (UNIPROT), while the latter seems to bind to lipopolysaccharide of P. gingivalis, acting in promoting angiogenesis and establishing microvasculature [32]. The gene discussed is SMR3B; the disease is periodontal disorder.