The mutations cause expression of a defective α chain or complete absence thereof, an essential part of high-affinity interleukin-2 (IL-2) receptors.
Glucose-6-phosphate dehydrogenase deficiency | CD25 | Ribose-5-phosphate isomerase deficiency | Phosphorus deficiency | Nitrogen deficiency | Lipoprotein lipase deficiency | Iron deficiency (medicine) | Iron deficiency | Holocarboxylase synthetase deficiency | Growth hormone deficiency |