Soluble in Benzene 9H-fluorene Manufacturers

China H&Z® L-Pyroglutamic Acid (also known as PCA, 5-oxoproline, pidolic acid, or pyroglutamate for its basic form) is a ubiquitous but little studied natural amino acid derivative in which the free amino group of glutamic acid or glutamine cyclizes to form a lactam.It is a metabolite in the glutathione cycle that is converted to glutamate by 5-oxoprolinase. Pyroglutamate is found in many proteins including bacteriorhodopsin. N-terminal glutamic acid and glutamine residues can spontaneously cyclize to become pyroglutamate, or enzymatically converted by glutaminyl cyclases. This is one of several forms of blocked N-termini which present a problem for N-terminal sequencing using Edman chemistry, which requires a free primary amino group not present in pyroglutamic acid. The enzyme pyroglutamate aminopeptidase can restore a free N-terminus by cleaving off the pyroglutamate residue.

n-Heptadecane CAS:629-78-7 Heptadecane99% Heptadecane99.5% heptadecane n-Heptadecane CAS:629-78-7

Potassium sorbate is the potassium salt of sorbic acid,is used as a food preservative.Potassium sorbate is effective in a variety of applications including food, wine, and personal-care products.

H&Z® Kojic acid is a kind of specialized inhibitor for melanin. It can prevent the tyrosinase activity through synthesizing with copper ion in

China H&Z® Saw palmetto extract is an extract of the fruit of Saw palmetto. It is rich in fatty acids and phytosterols. It has been used in traditional and alternative medicine for a variety of indications, most notably benign prostatic hyperplasia (BPH).

China H&Z® Stevia leaf powder stevioside is a new type of natural sweetener extracted from the compositae stevia (or stevia), while South America uses stevia as a herb and sugar substitute.