Figure 1. Degradation of SPLUNC1 protein by human neutrophil elastase (HNE).
(A) Western blot of recombinant human SPLUNC1 protein (10 µg/ml) that was incubated with HNE for 30 minutes. HNE treatment dose-dependently reduces the native SPLUNC1 protein (25 kD). A fragment of 22-kD SPLUNC1 was seen in HNE-treated samples. (B) Mass spectrometry analysis of NHE-treated recombinant human SPLUNC1 protein revealed a 25 amino acid peptide F21-T45 (FGGLPVPLDQTLPLNVNPALPLSPT).