U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

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Showing 1481 - 1490 of 4227 results

Okadaic acid (OA) is a naturally occurring polyether toxin that was originally derived from marine dinoflagellates, Prorocentrium spp.. It is a reversible, potent and selective inhibitor of two serine threonine protein phosphatases: PP2A-C (PP2A) which is inhibited completely at 1 nM and PP1 which is inhibited at higher concentrations (IC50= 10-15 nM). PP2B is much less sensitive to okadaic acid than PP1, while PP2C is not inhibited. This selectivity is the basis for an improved identification and quantification procedure for these enzymes. The hydrophobic backbone of okadaic acid enables it to enter cells where it stimulates intracellular protein phosphorylation. It mimics the effects of insulin, enhances transmitter release at neuromuscular junctions, causes vasodilation and is a very potent tumor promoter. Okadaic acid is an extremely useful tool for studying cellular processes that are regulated by phosphorylation. Okadaic Acid is an activator of PKC.
Histidine methyl ester is L-Histidine derivative that used in organic synthesis. L-Histidine methyl ester dihydrochloride is used to prepare optically pure L-(+)-ergothioneine.
Status:
Other

Class (Stereo):
CHEMICAL (ACHIRAL)

Stevia is the common word to refer to the plant stevia rebaudiana which is the sweetest of the stevia species of plants and historically used as a sweetening agent. Several studies have suggested that in addition to their sweetness, steviosides and their related compounds, including rebaudioside A and isosteviol, may offer additional therapeutic benefits. These benefits include anti-hyperglycaemic, anti-hypertensive, anti-inflammatory, anti-tumor, anti-diarrheal, diuretic, and immunomodulatory actions. Isosteviol inhibits DNA polymerases and human DNA topoisomerase II. It also retards growth of three different types of human cancer cells and inhibits inflammation induced by TPA. Isosteviol had been in phase II clinical trials for the treatment of Type 2 diabetes mellitus.
Status:
Other

Class (Stereo):
CHEMICAL (ABSOLUTE)

Status:
Other

Class (Stereo):
CHEMICAL (ACHIRAL)

Conditions:

Cupric cyanide represents an amorphous yellow powder insoluble in water. It is used in organic synthesis as the catalyst. Acute copper poisoning after ingestion can cause liver injury, methemoglobinemia, and hemolytic anemia. Acute renal failure may result, secondary to massive hemoglobinuria.

Showing 1481 - 1490 of 4227 results