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Alanine transaminase (ALT), also known as alanine aminotransferase (ALT or ALAT), formerly serum glutamate-pyruvate transaminase (GPT) or serum glutamic-pyruvic transaminase (SGPT), is a transaminase enzyme (EC 2.6.1.2) that was first characterized in the mid-1950s by Arthur Karmen and colleagues. [1]
In biochemistry, sulfotransferases (SULTs) are transferase enzymes that catalyze the transfer of a sulfo group (R−SO − 3) from a donor molecule to an acceptor alcohol (R−OH) or amine (R−NH 2). [1] The most common sulfo group donor is 3'-phosphoadenosine-5'-phosphosulfate (PAPS).
Cytochrome b5 reductase is a prevalent topic in research and clinical tests to understand the additional functions of the enzyme in other metabolic pathways in the body. Mice and flies are common model organisms used to test for the relationship of cytochrome b5 reductase with the overall health of living organisms.
The term "serum cholinesterase" is generally used in reference to a clinical test that reflects levels of both of these enzymes in the blood. [5] Assay of butyrylcholinesterase activity in plasma can be used as a liver function test as both hypercholinesterasemia and hypocholinesterasemia indicate pathological processes. The half-life of BCHE ...
The lack of the LAL enzyme can lead to a build-up of fatty material in several body organs including the liver, spleen, gut, in the wall of blood vessels and other important organs. The classic presentation is vomiting and failure to gain weight in a newborn with chalky bilateral adrenal calcifications on imaging, with life expectancy rarely ...
The structural site has been shown to be important for maintaining the long term stability of the enzyme. [13] More than 40 severe class I mutations involve mutations near the structural site, thus affecting the long term stability of these enzymes in the body, ultimately resulting in G6PD deficiency. [13]
Serum levels are normally less than 11.5 ng/mL. [7] Elevated levels of serum tryptase occur in both anaphylactic and anaphylactoid reactions, but a negative test does not exclude anaphylaxis. Tryptase is less likely to be elevated in food allergy reactions as opposed to other causes of anaphylaxis.
Monoamine oxidases (MAO) (EC 1.4.3.4) are a family of enzymes that catalyze the oxidation of monoamines, employing oxygen to clip off their amine group. [1] [2] They are found bound to the outer membrane of mitochondria in most cell types of the body. The first such enzyme was discovered in 1928 by Mary Bernheim in the liver and was named ...