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 […]
Vesicular transport assay vs cell-based 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, […]
What is Animal Component-Free (ACF) Cell Culture?
Animal component-free (ACF) cell culture eliminates animal-derived materials. Learn why ACF matters for GMP and cell therapy, and what alternatives exist to FBS.
What is Xeno-Free Cell Culture?
Xeno-free cell culture excludes materials from foreign species. Learn what xeno-free means, how it differs from ACF, and why it matters for cell therapy manufacturing.
What is rHSA (Recombinant Human Serum Albumin)?
rHSA is a recombinant form of human serum albumin produced in yeast or CHO cells. Learn its advantages over plasma-derived HSA and its uses in cell culture and diagnostics.
What is Recombinant Human Transferrin?
Recombinant human transferrin is an iron-carrier protein used in serum-free and xeno-free cell culture media. Learn its role, applications, and advantages over plasma-derived transferrin.
What is Disease State Serum?
Disease state serum is human serum from donors with specific conditions, used as a matrix or positive control in IVD assays. Learn about its applications and sourcing.
What is Normal Goat Serum (NGS)?
Normal goat serum (NGS) is used as a blocking agent in IHC, IF, and ELISA to reduce non-specific antibody binding. Learn how to use it and when to choose it.
What is Gamma-Irradiated FBS?
Gamma-irradiated FBS has been treated with gamma radiation to inactivate viruses and mycoplasma. Learn when to use it and what impact irradiation has on performance.
What is Low Endotoxin FBS?
Low endotoxin FBS contains <5 EU/mL of bacterial endotoxin. Learn when standard FBS is sufficient, when low endotoxin is required, and what ultra-low endotoxin means.