Complex sentence: The lack of functional aminoacylase 1 caused by A1D results in a dysfunctional urea cycle, causing a variety of neurological disorders including seizures, muscular hypotonia, mental retardation, and impaired psychomotor development.
Split into simpler sentences: The lack of functional aminoacylase 1 caused by A1D results in a dysfunctional urea cycle. A1D manifests itself as a variety of neurological disorders, including seizures, muscular hypotonia, mental retardation, and impaired psychomotor development.