Additionally, similar directional changes in transcript levels for Atf5, Hsp10 and mtHsp70 and protein levels for LONP1, CLPP and SIRT3 (Fig. 5) were observed in the lungs of HPS-2 mice, illustrating the reproducibility of our findings across in vivo and in vitro model systems. The gene discussed is HSPA9; the disease is Hermansky-Pudlak syndrome.