Regular expressions provide a very powerful way to describe patterns in text, making them an excellent resource for string validation and manipulation. The .NET Framework provides first-rate support for regular expressions in its System.Text.RegularExpressions namespace and specifically the Regex class found there.
Other mutations reduce but don't completely eliminate the activity of beta-hexosaminidase A and these genetic changes are responsible for the less severe forms of Tay-Sachs disease, which appear later in life as late onset TSD.ere are two locations for the HEXA gene. Cytogenetic Location: 15q23-q24 (The HEXA gene is located on the long (q) arm of chromosome 15 between positions 23 and 24. Each chromosome is divided into two sections called 'arms'.
People with Tay-Sachs lack a specific protein (enzyme) called hexosaminidase A. This enzyme deficiency causes a fatty substance, GM2 ganglioside, to build up in the brain. It is this accumulation that causes the symptoms of Tay-Sachs.lthough anyone can be a carrier of Tay-Sachs disease, the disease is much more common among people of Ashkenazi (Eastern European) Jewish descent. One in every 30 people of Ashkenazi Jewish descent is a carrier.