商品编号


LS004968



品牌


Worthington



公司


Worthington Biochemical Corporation



公司分类


Products



Size

250 mg

商品信息
Tyrosine Decarboxylase, ApoenzymeAPOenzyme. Dried cells grown in B6 deficient media.Store at -20°C.REQUIRES SPECIAL SHIPPING: DRY ICEActivates to at least 0.2 units per mg
Source:
Streptococcus faecalis (NCTC6783)
I.U.B.: 4.1.1.25
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.
Unit Definition
: One Unit yields 1?mole of CO
2
per minute from L-tyrosine at 37°C, pH 5.5. The APOenzyme activity is measured in the presence of excess pyridoxal phosphate.