However, CCSP.CRE;DTA mice displayed widened airway and alveolar dimensions with inflammatory interalveolar septal destruction evident by increased mean linear intercept, CD45+ CD11b+ cells in BAL, and static compliance (Figure 5B and C and Figure 5—source data 1), mimicking human chronic obstructive pulmonary disease (Barnes et al., 2015). The gene discussed is PTPRC; the disease is chronic obstructive pulmonary disease.