-
FAO Activity Negative Results? Data Analysis Help(Post)
Quick answer On the Fatty Acid Oxidation (FAO) Assay Kit (BR00001), a researcher found that a subset of skeletal-muscle samples returned negative values once the control well was subtr
AKT Signalling – Mini Review(Post)Protein kinase B or AKT (PKB) is a serine/threonine kinase. In mammals it is comprised of 3 highly homologous isoforms PKBα (Akt1), PKBβ (Akt2), and PKBγ (Akt3) (Manning and Cantley 2007). AKT
Sample Dilution Range Calculation for Competitive ELISA kits(Post)Quick answer A competitive ELISA is running correctly when the blank (zero standard) gives the highest OD, the standard curve drops smoothly with rising concentration, and your samples land in the
Competitive vs Sandwich ELISA: Should You Subtract the Blank?(Post)Quick answer: A researcher subtracted the blank from a competitive ELISA (a Serotonin kit) and every result turned negative. In a competitive assay the signal is inversely proportional to
ELISA High Background Troubleshooting: FBS Matrix Interference(Post)Quick answer A researcher running a Rat Eotaxin/CCL11 (Eotaxin) sandwich ELISA saw sample readings sit above the top standard and wells turn colour the instant TMB was added — even aft
ELISA Cross-Reactivity: Tagged Standards vs Native Samples(Post)Quick answer A researcher validating two isoform assays — the Human ALT1 (HUFI00557) and ALT2 (HUFI00593) ELISA kits — spiked the ALT2 kit's standard onto the ALT1 kit's plate and saw
ELISA Plate-to-Plate OD Differences: Same-Lot Troubleshooting(Post)Quick answer When plates from the same lot give very different OD values, the cause is almost always a comparison problem, not a manufacturing problem. The three usual culprits are a t
8-OHdG/Creatinine Ratio Too High? Urine ELISA Troubleshooting(Post)Quick answer A researcher running an 8-OHdG ELISA and a creatinine ELISA on human urine got 8-OHdG/creatinine ratios in the hundreds, then the thousands, of ng/mg, far above the ~30–40
ELISA Inter-Plate Variability: Same Sample, Different Results(Post)Quick answer On the Dog Beta-endorphin (BEP) ELISA Kit, a researcher ran the same canine serum aliquots on two plates from the same lot and saw roughly double the concentration on one
Mycoplasma Detection Kit Troubleshooting: The Importance of Cell Confluence(Post)Quick answer A researcher's samples read negative at the standard 1-hour incubation on the MycoGenie Rapid Mycoplasma Detection Kit (MORV0011), but many turned positive after 2 hours.
LPS ELISA Troubleshooting: The Importance of Sample Nature(Post)Quick answer A researcher measuring circulating lipopolysaccharide (LPS) in human serum with our LPS ELISA saw almost no color, even after 30 minutes with substrate. Samples had been test
ELISA Troubleshooting: Total Protein Normalization in Lysates(Post)QUICK ANSWER A researcher ran a panel of EMT-marker ELISA kits (E-cadherin, claudin-1, N-cadherin, vimentin, ZEB1, TWIST1) on breast cell-line lysates and found E-cadherin reading "pos
Red Blood Cell Peroxidase Interference in Competitive ELISA(Post)QUICK ANSWER A researcher ran a competitive 2,3-bisphosphoglycerate (2,3-BPG) ELISA on red blood cell (RBC) lysate. The standard curve was textbook, yet every lysate sample read at the
Glucose Assay Saliva Troubleshooting: Fixing Low Readings(Post)Quick answer A researcher measuring glucose in human saliva on the fluorometric procedure of a glucose assay kit had a textbook standard curve, yet every sample read far below the expe
ELISA Troubleshooting: Why You Can't Skip the Full Standard Curve(Post)Quick answer A researcher measuring dopamine in mouse brain tissue got no detectable signal and, with many samples to run, asked whether the full standard curve could be skipped to sav
ELISA Troubleshooting: A Low Standard Curve and Samples Reading Off-Scale(Post)Quick answer On the Periaxin (PRX) ELISA, a researcher found every serum sample reading above the top standard — optical density (OD) around 2.8–3.0 at 450 nm, well beyond the highest
Types of ELISA: Direct, Indirect, Sandwich & Competitive Compared(Post)Written by Seán Mac Fhearraigh, PhD • Updated: 19 May 2026 • ~9 min read Quick Answer The five main types of ELISA are sandwich, competitive, direct, indirect and multiplex. Sandwich ELISA is
Comment choisir une protéine cytokine pour votre étude(Post)Comment choisir une protéine cytokine pour votre étude Pour une mesure fonctionnelle in vitro, privilégiez une cytokine recombinante à activité biologique validée sur la lignée cible. Pour une admini
Polyclonal Vs Monoclonal antibodies: Key features (Post)Antibodies · Reagent GuideMonoclonal vs Polyclonal Antibodies: Key DifferencesMonoclonal and polyclonal antibodies are the two workhorse reagent types in research, diagnostics and therapy. Monoclonals
Immune Regulation in COVID-19 (Post)Immune Regulation in COVID-19: Immunomodulatory Mechanisms against SARS-CoV-2 Infection What is COVID-19?