Since the cloning of the cDNA for X-linked ornithine transcarbamylase (OTC) in 1984, diagnostic accuracy of OTC deficiency for prenatal and carrier detection has been greatly improved by the use of linkage analysis.
Use of denaturing gradient gel electrophoresis for detection of mutation and prospective diagnosis in late onset ornithine transcarbamylase deficiency.
Among 24 cases of OTC deficiency previously examined, three unrelated individuals all showed loss of a Taq I site in the OTC gene corresponding to codon 109, suggesting that this Taq I site may be prone to mutation.
Point mutations in the X-linked ornithine transcarbamylase (OTC) gene have been detected at the same Taq I restriction site in 3 of 24 unrelated probands with OTC deficiency.