Variants of a gene. Every gene occupies a specific site on a chromosome, known as its gene locus. Alternative forms of the genetic information can occur at each locus – variants that developed in the past (...)

Alpha-1 antitrypsin deficiency

A hereditary (genetic) disorder in which serum levels of alpha-1 antitrypsin are greatly reduced due to decreased production of the enzyme. This deficiency can lead to chronic diseases, which in adults (...)


The AlphaKit® is a system for applying and sending off blood drops – drawn for example from the fingertip. It consists of a piece of filter paper that is then saturated with blood. Once (...)

Amino acids

The building blocks of proteins. Around 20 amino acids occur in nature. Of these, the human body is able to synthesize only ten itself; the others must all be included in the diet. The various amino acids (...)


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