FBS Lot Testing Protocol — Step-by-Step Guide
August 2026 · 7 min read You have found an FBS lot that works. Growth is consistent, your assay data is clean, and reproducibility is solid. Then the lot runs out — and the next one behaves differently. Growth slows. Background rises. Your IC50 shifts by a factor of three. Buy fetal bovine serum (FBS) […]
Human AB Serum — Complete Guide to Uses, Grades & When to Switch
August 2026 · 8 min read Human AB serum is one of those reagents that sits in the catalogue of every life science supplier — but it rarely gets explained properly. When does it actually outperform FBS? When is it essential rather than just an alternative? And when should you keep using FBS? This guide […]
In Vitro Drug Metabolism — CYP450, Microsomes & Hepatocytes
August 2026 · 8 min read Human AB serum is one of those reagents that sits in the catalogue of every life science supplier — but it rarely gets explained properly. When does it actually outperform FBS? When is it essential rather than just an alternative? And when should you keep using FBS? This guide […]
Inside-Out Membrane Vesicles Explained
August 2026 · 8 min read If you are new to DMPK transporter assays, the term “inside-out membrane vesicles” comes up immediately — and it is rarely explained from the ground up. What are they, exactly? How are they made? Why does the inside-out orientation matter? And why can’t you just use cells? Buy ABC […]
FDA & EMA Mandatory Drug Transporters
August 2026 · 10 min read Before your drug candidate enters first-in-human trials, regulatory agencies expect you to have characterised its interactions with a defined set of drug transporters. Miss one, and you risk a clinical hold, a label restriction, or a post-market safety signal that could have been identified in a 96-well plate. Get […]
Vesicular Transport vs. Cell-Based vs. ATPase Assay
August 2026 · 9 min read You need to assess whether your drug candidate interacts with an ABC efflux transporter. Three in vitro methods are available: the vesicular transport assay, the cell-based monolayer assay, and the ATPase assay. Each works — but each has a specific permeability window, throughput profile, and regulatory acceptance level that […]
Vesicle Transport Assay vs. ATPase Assay — Which Method for Which Question?
Home/Resources/Vesicle Assay vs. ATPase Assay DMPK Science · Assay Selection · Cell4Pharma Both are established, both appear in regulatory submissions — and both produce false negatives that are easy to miss. A direct comparison. Buy ABC transporter vesicle kits (HEK293-derived) Request a quote for P-gp, BCRP, BSEP and MRP vesicle kits for in vitro DDI […]
BSEP Inhibition and Drug-Induced Liver Injury — What Your DILI Risk Assessment Is Missing
Home/Resources/BSEP Inhibition & DILI DMPK Science · Hepatotoxicity · Cell4Pharma Why a single BSEP IC50 systematically underestimates hepatotoxicity risk, and how the dual liability concept changes your screening panel. Buy ABC transporter vesicle kits (HEK293-derived) Request a quote for P-gp, BCRP, BSEP and MRP vesicle kits for in vitro DDI studies. BSEP (ABCB11) vesicle kit […]
Why Your FBS Isn’t the Problem
Why Your FBS Isn’t the Problem — and What to Replace It With | SeamlessBio Blog Cell Culture FBS Alternatives Protocol Guide July 2026 · 8 min read Why Your FBS Isn’t the Problem — and What to Replace It With Everyone is talking about going serum-free. But before you spend three weeks adapting your […]
Vitamin D Depleted Human Serum for IVD Calibrator Manufacturing — A Practical Guide
Vitamin D testing is one of the highest-volume clinical chemistry assays performed globally. Tens of millions of 25-hydroxyvitamin D tests are run annually on automated immunoassay platforms — and every one of those assay kits requires a calibrator matrix with Vitamin D removed to background level. That matrix is Human Processed Serum (HPS) Vitamin D […]
English
Deutsch