Tyrosine decarboxylase catalyzes the removal of the carboxyl group from tyrosine to produce tyramine and carbon dioxide. Pyridoxal 5'-phosphate is a necessary cofactor. By using the apoenzyme prepared from cells grown on a vitamin B6 deficient medium pyridoxal phosphate may be determined. The HOLOenzyme may be used to determine tyrosine, phenylalanine and dihydroxyphenylalanine either manometrically or colorimetrically. L-Tyrosine decarboxylase apoenzyme from Streptococcus faecalis has been used in a study to purify and characterize tyrosine decarboxylase and aromatic-L-amino-acid decarboxylase.L-Tyrosine decarboxylase apoenzyme from Streptococcus faecalis has also been used in a study to investigate the stereospecificity of sodium borohydride reduction of tyrosine decarboxylase. One Unit yields 1μmole of CO2 per minute from L-tyrosine at 37°C, pH 5.5. The APOenzyme activity is measured in the presence of excess pyridoxal phosphate.
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酪氨酸脱羧酶 来源于粪链球菌(NCTC6783)(脱辅酶)
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| Chinese alias | L-Tyrosine carboxy-lyase | ||
| English alias | L-Tyrosine carboxy-lyase | ||
| CAS number | unknown | molecular formula | |
| molecular weight | - | Exact mass | - |
| PSA | - | logp | - |
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3
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Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
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