Thus, we have examined the expression of nine proteins (ALDH1A1, ECE1, MIF, IGFBP3, PTGIS, FHL1, MYL9, CNN1, and CNN2) in the panel of control (C1 and C4) and SIFD patient-derived fibroblasts (P1, P2, P6, and P7) by western blotting. This evidence concerns the gene CNN2 and congenital sideroblastic anemia-B-cell immunodeficiency-periodic fever-developmental delay syndrome.