CheKine™ Micro NADK Activity Assay Kit: The Superior Choice for NADPH Research
NADK: The Master Regulator of NADP(H) Production
NAD kinase (NADK, EC 2.7.1.23) is the only known enzyme in vivo that catalyzes the phosphorylation of NAD⁺ to generate NADP⁺, making it a critical gatekeeper of cellular redox balance and anabolic metabolism[reference:0][reference:1]. NADP⁺ is subsequently reduced to NADPH, the essential reducing power for fatty acid synthesis, nucleic acid production, and glutathione-dependent antioxidant defense.
Accurate measurement of NADK activity is therefore fundamental to understanding metabolic reprogramming in cancer, aging, and oxidative stress-related diseases.
Why Abbkine KTB1022 Leads the Field
| Feature | Abbkine KTB1022 | Conventional NADK Assays |
|---|---|---|
| Detection Principle | NADK → NADP⁺ → NADPH (340 nm absorbance)[reference:2] | Variable; often indirect |
| Sample Types | Serum, plasma, tissues, cells, plants, bacteria[reference:3] | Limited compatibility |
| Sensitivity | High; detects NADPH accumulation rate | Variable |
| Protocol | Simple, microvolume format[reference:4] | Often complex |
| Throughput | 96-well microplate compatible | Lower throughput |
| Publications | 5 citations including Chinese Medicine[reference:5] | Fewer |
The Principle That Delivers Precision
The kit operates on a elegant enzymatic cascade: NADK in the sample catalyzes the phosphorylation of NAD⁺ to NADP⁺; NADP⁺ is then reduced to NADPH by glucose-6-phosphate dehydrogenase[reference:6]. NADPH exhibits a characteristic absorption peak at 340 nm[reference:7]. By measuring the rate of increase in absorbance at 340 nm, NADK activity is accurately quantified.
Applications Across Research Fields
- Cancer Metabolism — NADK drives NADPH production for lipid biosynthesis in proliferating tumor cells
- Aging Research — NADK activity declines with age; kit used in AMPK/Sirt1 signaling studies[reference:8]
- Redox Biology — understanding NADPH-dependent antioxidant systems
- Plant Science — studying NADP(H) homeostasis in stress responses
- Microbiology — bacterial NADK as a potential antibiotic target
The Bottom Line
For researchers investigating NADP(H) metabolism, redox balance, or anabolic pathways, KTB1022 offers a validated, sensitive, and versatile solution that saves precious samples without compromising data quality.
👉 Quantify NADK activity with confidence. View Product
