Total protein was extracted from A549 cells transduced with adenovirus expressing WT or ABCA3 variant constructs encoding p.Asn140His, p.Phe1203del, p.Ser1262Gly, p.Val1399Met, p.Leu101Pro, or p.Glu292Val. ABCA3-GFP protein was detected using anti-GFP antibody and normalized to β-actin. Except for the previously characterized type I trafficking mutant p.Leu101Pro, all mutant ABCA3 proteins demonstrated immunoblotting patterns similar to WT-ABCA3.