NCIt definition : Human USP18 wild-type allele is located in the vicinity of 22q11.2 and is approximately
27 kb in length. This allele, which encodes Ubl carboxyl-terminal hydrolase 18 protein,
is involved in the cleavage of proteins conjugated with ubiquitin-like protein ISG15.
Mutation of the gene is associated with pseudo-TORCH syndrome 2.;