Human Oxytocin (OT) ELISA Kit — FAQ for Neuroscience, Social Behavior, and Reproductive Research
Human Oxytocin ELISA Kit: Your Questions Answered Oxytocin (OT) is a 9-amino-acid cyclic nonapeptide (Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH₂, MW ~1007 Da) synthesized in the hypothalamus and released from the posterior pituitary. It is best known for its roles in parturition (uterine contraction) and lactation (milk ejection), but modern neuroscience has expanded its profile to include social bonding, trust, empathy, maternal behavior, and stress modulation. Oxytocin is also implicated in autism spectrum disorder, postpartum depression, and cardiovascular regulation. Abbkine's Human Oxytocin (OT) ELISA Kit (KTE62212) provides researchers with a sensitive and specific tool for quantifying this critical neuropeptide in human samples. Here are answers to the most common questions about this kit and oxytocin detection. What is the detection principle of this oxytocin ELISA kit? This kit employs a competitive or sandwich ELISA format to quantitate OT in samples. A specific…
Human Aquaporin 3 (AQP3) ELISA Kit — Technical Comparison & Buying Guide for Skin, Kidney, and Cancer Researchers
AQP3: The Multitasking Channel You Keep Measuring Wrong Aquaporin 3 (AQP3) is not just a water pipe. It is an aquaglyceroporin — a membrane channel that transports water, glycerol, and hydrogen peroxide across the plasma membrane. This three-substrate capacity puts AQP3 at the center of processes that have nothing to do with simple osmosis: skin hydration (it delivers glycerol to the epidermis for the stratum corneum's moisture-retention machinery), renal water reabsorption (it is the basolateral exit route in collecting duct principal cells), and tumor metabolic reprogramming (cancer cells hijack AQP3-mediated glycerol uptake to fuel glycolysis). AQP3 is overexpressed in psoriasis (driving epidermal water loss), downregulated in acute kidney injury (impairing urine concentration), and hijacked by cancer cells to support glycolysis via glycerol uptake. It is also implicated in gastric cancer, colorectal cancer, and wound healing. Yet traditional AQP3…
Human CTX-II ELISA Kit — Application Scenarios for Osteoarthritis and Cartilage Degradation Research
CTX-II: The Micromolar Barcode Your Knee Leaves in Your Plasma C-telopeptide of type II collagen (CTX-II) is a degradation fragment released into biological fluids when type II collagen — the primary structural protein of articular cartilage — is cleaved by collagenases (MMP-13, MMP-1) during cartilage catabolism. Unlike imaging (which shows you the aftermath) or symptom scores (which fluctuate with weather and mood), CTX-II is a direct, quantitative readout of collagen degradation rate at the exact moment your sample was drawn. It has been put forward as a marker of collagen type II degradation being part of osteoarthritis, and CTX-II levels in synovial fluid directly reflect the rate of cartilage metabolism. Abbkine's Human C-telopeptide of type II collagen (CTX-II) ELISA Kit (KTE62194) delivers a calibration range of 10–160 nmol/L and…
Human CYBB/NOX2 ELISA Kit — Technical Comparison & Buying Guide for Innate Immunity and Oxidative Burst Researchers
CYBB/NOX2: The 91-kDa Catalytic Heart of the Phagocyte NADPH Oxidase Cytochrome b-245 heavy chain (CYBB) , also known as gp91phox or NOX2 (UniProt: P04839, Gene ID: 1536), is the catalytic subunit of the phagocyte NADPH oxidase — the enzyme complex that deliberately produces superoxide radicals (O₂⁻) to kill engulfed bacteria. CYBB heterodimerizes with CYBA (p22phox) to form the membrane-bound cytochrome b-245 flavocytochrome, which transfers electrons across the phagosomal membrane from cytosolic NADPH to molecular oxygen. This is not a subtle metabolic enzyme. It is the molecular weapon of the innate immune system: when neutrophils or macrophages engulf a pathogen, CYBB-bearing cytochrome b₅₅₈ assembles with cytosolic subunits (p47phox, p67phox, p40phox, Rac) to fire the oxidative burst that powers microbicidal activity. When CYBB is mutated — including more than…
Human DACT2 ELISA Kit — Application Scenarios for Wnt Signaling, EMT, and Epigenetic Cancer Research
DACT2: The 83-kDa Methylation Sentinel at 6q27 DACT2 (Dapper Homolog 2 / DPr2 / DAPPER2) is an ~83 kDa cytoplasmic scaffold protein (UniProt: Q5SW24, Gene ID: 168002, Chr 6q27) that physically couples Dishevelled (Dvl) to β-catenin destruction dynamics, promotes lysosomal clearance of Nodal/TGF-β type I receptors, and — most clinically relevant — is frequently silenced by promoter CpG hypermethylation in ~50–90% of tumors across colon, breast, HCC, NPC, lung, gastric, and esophageal contexts[reference:12]. If your lab works on Wnt/β-catenin, EMT, or methylation-driven tumor suppression, you've almost certainly written the sentence "DACT2 was downregulated in our cancer cohort" — usually inferred from a qPCR melt curve or a methylation-specific PCR gel, and almost never backed by an actual protein-level measurement[reference:13]. That's a problem, because DACT2 is not just…
Human DAD1 ELISA Kit — FAQ for ER Stress, Glycosylation, and Apoptosis Researchers
Human DAD1 ELISA Kit: Your Questions Answered DAD1 (Defender Against Apoptotic Cell Death 1) , also known as OST2 (oligosaccharyltransferase subunit 2), is a ~113-amino-acid, ~12.5 kDa multi-pass ER membrane protein that serves as an essential subunit of the oligosaccharyltransferase (OST) complex. The OST complex is the molecular machine responsible for attaching N-linked glycans to nascent proteins in the endoplasmic reticulum (ER) — the defining co-translational modification of the secretory pathway. This glycosylation step dictates protein folding, stability, and trafficking, making DAD1 a linchpin in ER homeostasis, immune recognition, and disease progression. The dramatic name dates back to the tsBN7 temperature-sensitive hamster cell line: shift to nonpermissive temperature → DAD1 protein vanishes → N-glycosylation collapses → misfolded secretory proteins accumulate → UPR hyperactivated → apoptosis → hence "Defender Against…
Human Hyaluronic Acid (HA) ELISA Kit — Product Review & Buying Guide for Liver Fibrosis and Joint Research
Hyaluronic Acid: The Megadalton Slime That Predicts Liver Failure and Joint Destruction Hyaluronic acid (HA, hyaluronan) is the only glycosaminoglycan in your body that isn't sulfated, isn't built in the Golgi, and can reach a molecular weight of 4,000–10,000+ kDa — a single polymer chain long enough to span the entire pericellular coat and physically gate which proteins, growth factors, and immune cells touch the cell surface[reference:3]. HA is the frictional cushion in your synovial fluid (giving it that egg-white viscoelasticity that lets joints bear load without grinding), the hydration sponge in your dermis, and the matrix organizer in liver sinusoids. Critically for anyone running a cancer or fibrosis lab, serum HA levels track endothelial barrier breakdown, fibroblast activation, and the transition from compensated cirrhosis to decompensation[reference:4]. Yet…
Human Hepcidin 25 (HEPC25) ELISA Kit — Technical Comparison & Buying Guide for Iron Metabolism Researchers
Hepcidin-25: The 25-Amino-Acid Master Switch of Iron Homeostasis Hepcidin-25 (HEPC25) is a 25-amino-acid, cysteine-rich peptide produced by the liver that serves as the master regulator of systemic iron homeostasis. It works by binding to ferroportin — the only known cellular iron exporter — triggering its internalization and degradation. This single molecular event determines how much iron enters the bloodstream from intestinal absorption, how much is recycled from macrophages, and ultimately, how much iron is available for erythropoiesis. The clinical stakes are enormous. Hepcidin-25 levels differentiate iron-deficiency anemia (where hepcidin is suppressed) from anemia of chronic disease (where hepcidin is paradoxically elevated by inflammatory cytokines like IL-6). In chronic kidney disease, hepcidin-25 predicts responsiveness to erythropoiesis-stimulating agents. In hereditary hemochromatosis, hepcidin deficiency drives iron overload. And in COVID-19, hepcidin-25…
Human LTBP3 ELISA Kit — Application Scenarios for TGF-β Biology, Adipogenesis, and Skeletal Research
LTBP3: The Molecular Librarian of TGF-β Storage Latent-transforming growth factor beta-binding protein 3 (LTBP3) is a ~130–150 kDa secreted glycoprotein that performs one of the most elegant jobs in extracellular matrix (ECM) biology: it stores TGF-β in a latent, inactive form and releases it on demand when the tissue needs it. LTBP3 covalently binds the Latency-Associated Peptide (LAP), which in turn holds the mature TGF-β1, TGF-β2, or TGF-β3 in a molecular embrace. Together, this ternary complex — LAP–TGF-β–LTBP3 — is anchored to the ECM via LTBP3's interaction with fibrillin microfibrils, keeping a reservoir of the most potent cytokine in the body locked away until proteases, integrins, or mechanical force liberate it. LTBP3 is not a passive library shelf. It controls TGF-β bioavailability at…
Human Tyrosine-Protein Kinase Lyn (LYN) ELISA Kit — Technical Comparison & Buying Guide for Immune Signaling and Cancer Research
LYN: The Src-Family Kinase That Decides Whether B Cells Fire or Go Silent Lyn kinase (LYN, Lck/Yes-related novel tyrosine kinase) is a member of the Src family of cytoplasmic (non-receptor) protein tyrosine kinases that catalyzes the transfer of the gamma-phosphoryl group from ATP to tyrosine residues in protein substrates[reference:40]. Lyn was first identified in 1987 by Yamanashi et al., and its principal function is the transduction of signals after activation of different cellular receptors[reference:41]. Lyn, as well as Fyn and Blk, promotes B cell activation by phosphorylating ITAMs (immunoreceptor tyrosine activation motifs) in CD19 and in Ig components of the BCR — a critical role in adaptive immunity[reference:42]. Yet despite its central role in immune signaling, quantifying Lyn in disease models…
