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Polyphenol oxidase is an enzyme found throughout the plant and animal kingdoms, [31] including most fruits and vegetables. [32] PPO has importance to the food industry because it catalyzes enzymatic browning when tissue is damaged from bruising, compression or indentations, making the produce less marketable and causing economic loss.
Peroxidase activity is measured by running the phenol oxidase assay concurrently with another assay with L-DOPA and hydrogen peroxide (H 2 O 2) added to every sample. [48] The difference in measurements between the two assays is indicative of peroxidase activity. Enzyme assays typically apply proxies that reveal exo-acting activities of enzymes.
22173 Ensembl ENSG00000077498 ENSMUSG00000004651 UniProt P14679 P11344 RefSeq (mRNA) NM_000372 NM_011661 NM_001317397 RefSeq (protein) NP_000363 NP_001304326 NP_035791 Location (UCSC) Chr 11: 89.18 – 89.3 Mb Chr 7: 87.07 – 87.14 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Tyrosinase is an oxidase that is the rate-limiting enzyme for controlling the production of melanin. The ...
Ceruloplasmin EC 1.16.3.1 (ferroxidase), a 6-domain enzyme found in the serum of mammals and birds that oxidizes different inorganic and organic substances; exhibits internal sequence homology that appears to have evolved from the triplication of a Cu-binding domain similar to that of laccase and ascorbate oxidase. Laccase EC 1.10.3.2 (urishiol ...
In one pathway, tyrosine undergoes decarboxylation catalyzed by tyrosine decarboxylase (TyrDC) to become tyramine, which is then followed by oxidation of polyphenol oxidase (PPO) to render dopamine. [ 19 ] [ 20 ] Alternatively, tyrosine can be oxidized by tyrosine hydroxylase (TH) to form L-DOPA , which is then later decarboxylated by DOPA ...
Catechol oxidase is a copper oxidase that contains a type 3 di-copper cofactor and catalyzes the oxidation of ortho-diphenols into ortho-quinones coupled with the reduction of molecular oxygen to water. It is present in a variety of species of plants and fungi including Ipomoea batatas (sweet potato) [1] and Camellia sinensis (Indian tea leaf). [2]
3,4-Dihydroxyphenylacetic acid (DOPAC) is a metabolite of the neurotransmitter dopamine.Dopamine can be metabolized into one of three substances. One such substance is DOPAC.
Oxidopamine, also known as 6-hydroxydopamine (6-OHDA) or 2,4,5-trihydroxyphenethylamine, is a synthetic monoaminergic neurotoxin used by researchers to selectively destroy dopaminergic and noradrenergic neurons in the brain.