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(verify) tetrahydrobiopterin (bh , thb), also known as sapropterin (inn), [ ] [ ] is a cofactor of the three aromatic amino acid hydroxylase enzymes, [ ] used in the degradation of amino acid phenylalanine and in the biosynthesis of the neurotransmitters serotonin ( -hydroxytryptamine, -ht), melatonin
[ edit ] tyrosine hydroxylase (th) catalyses the conversion of l-tyrosine to l-dopa (dopa), which is the precursor for dopamine . dopamine is a vital neurotransmitter , and is the precursor of norepinephrine and epinephrine . thus, a deficiency of bh can lead to systemic deficiencies of dopamine, norepinephrine...
https://en.wikipedia.org/wiki/Tetrahydrobiopterin
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leather custom compounding of rubber materials custom compounding-purchased resin (mfr) cutting of leather cutting oils, blending: made from purchased materials cyclo rubbers, synthetic cytology and histology diagnostic agents damper operators: pneumatic, thermostatic, electric dampers manufacturers...
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pad cotton fabric, rubber lined hose credit card/other plans equipment and supplies creosote, wood creosoted wood paving blocks culture media cup packing, leather cuprammonium fibers cups and plates, foamed plastics cups, primer and cartridge: copper and copper alloy curlers, hair, rubber currying of
leather custom compounding of rubber materials custom compounding-purchased resin (mfr) cutting of leather cutting oils, blending: made from purchased materials cyclo rubbers, synthetic cytology and histology diagnostic agents damper operators: pneumatic, thermostatic, electric dampers manufacturers...
https://www.smallbusinessdb.com/sic_materials_chemicals
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