A regular expression is a pattern that the regular expression engine attempts to match in input text. A pattern consists of one or more character literals, operators, or constructs. For a brief introduction, see .NET Framework Regular Expressions.
(For our list of subjects with an imprinting defect, click here.). UBE3A Mutation. Malfunction of the UBE3A gene on the maternal chromosome #15 seems to be the cause of Angelman syndrome. In the case of a UBE3A mutation, there is a mistake in the genetic code of the UBE3A gene.
People with Angelman syndrome often smile and laugh frequently, and have happy, excitable personalities. Developmental delays, between about 6 and 12 months of age, are usually the first signs of Angelman syndrome. Seizures often begin between the ages of 2 and 3 years old. People with Angelman syndrome tend to live a normal life span, but the disease cannot be cured. Treatment focuses on managing medical and developmental issues.