ABPs cofilin-1 (CFL), insulin receptor substrate 53 kDa/brain-specific angiogenesis inhibitor 1-associated protein 2 (IRSp53/BAIAP2), and dihydropyrimidinase-related protein 3 (DPSYL3) plus actin-bundling protein lysozyme C (LYZ) were more abundant in CF sweat. The gene discussed is BAIAP2; the disease is cystic fibrosis.