Confirmation of clinical diagnosis for<unk>  requires genetic testing and gene sequencing to identify deleterious mutations in the<unk>  gene. Other diagnostic tools include Isoelectrofocusing of Transferrin (TIEF), an assay from transferrin levels in blood, to screen for N-glycosylation defects which occur in<unk> s. A<unk>  blood analysis test using mass spectrometry technology is also available. As<unk>  is also an inheritable disorder, parental genetic testing can indicate if one or both of the parents are carriers of the faulty gene. The gene is recessive in nature, so if both parents are carriers of the condition, there is a 25% chance that the offspring will have<unk> .
SRD5A3-CDG
ALG1-CDG
BGR-34
VIR-576
TA-CD
ALD-52
AP-7 
P14arf