ZNF418 and popliteal pterygium syndrome: Moreover, in this group, for ZNF418, the processes involved in elastic fiber formation, defective B3GALTL causes Peters-plus syndrome (PpS), O-glycosylation of TSR domain-containing proteins, molecules associated with elastic fibers, collagen chain trimerization, cGMP effects, defective CHST6 causes MCDC1, defective B4GALT1 causes B4GALT1-CDG (CDG-2d), and defective ST3GAL3 causes MCT12 and EIEE15 were indicated.