FAQ

Learn what Fc-tagged proteins are, why they are used, and when to choose Fc vs His tag. Covers purification, receptor binding assays, ADCC, in vivo PK studies, and common pitfalls.

Compare polyclonal, hybridoma monoclonal, and recombinant monoclonal antibodies across 8+ applications. Decision matrix for WB, IHC, flow cytometry, ELISA, IP, and in vivo use.

Compare hybridoma monoclonal and recombinant monoclonal antibodies for IHC. Learn why rabbit recombinants often outperform on FFPE tissue and when to stick with established clones.

Solve common multiplex immunoassay problems: analyte cross-reactivity, hook effect, matrix interference, spectral bleed, and poor inter-plate reproducibility.

Understand why lot-to-lot variation occurs in polyclonal, hybridoma monoclonal, and recombinant antibodies. Learn strategies to protect your experiments from inconsistent antibody lots.

Learn what knockout-validated means for antibodies. Compare KO validation with siRNA knockdown, overexpression, and peptide competition. Includes how to read KO validation data.

Understand the difference between antibody affinity (single-site KD) and avidity (multivalent binding strength). Learn which matters more for ELISA, WB, flow cytometry, and IHC.

Select anti-idiotype antibodies for PK and ADA bioanalytical assays. Learn blocking vs non-blocking anti-ID, bridging ELISA setup, and how research biosimilars reduce assay development costs.

Learn how to titrate antibodies for flow cytometry, WB, IHC, and ELISA. Calculate Staining Index, find optimal concentration, and avoid common titration mistakes.

Learn why endotoxin (LPS) contamination matters for in vivo antibody experiments. Covers acceptable EU/mg levels, in vivo grade vs research grade, and endotoxin removal methods.