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Analysis Biomolecular Interactions of Human Monoclonal Antibody RSB1 with D25 by BLI (CAT#: STEM-MB-0230-CJ)

Introduction

Human respiratory syncytial virus is a highly infectious member of the pulmonary virus family of negative envelope RNA viruses. Over 80% of the population has been exposed to respiratory syncytial virus by the age of 2 years, making respiratory syncytial virus the most common cause of acute lower respiratory illness in children under 5 years of age who are hospitalised. Currently, the only respiratory syncytial virus approved intervention to reduce respiratory syncytial virus-related hospitalisation in young infants is the prophylactic administration of the monoclonal antibody (mAb) palivizumab. Although several respiratory syncytial virus vaccine programmes have been in clinical development over the past decade, no vaccine has been approved to date.




Principle

Bio-Layer Interferometry (BLI) is an optical technique for measuring macromolecular interactions by analyzing interference patterns of white light reflected from the surface of a biosensor tip. BLI experiments are used to determine the kinetics and affinity of molecular interactions. In a BLI experiment, one molecule is immobilized to a Dip and Read Biosensor and binding to a second molecule is measured. A change in the number of molecules bound to the end of the biosensor tip causes a shift in the interference pattern that is measured in real-time.

Applications

Immunology/Inflammation; Virology; Pharmacology;

Procedure

1. Detect Buffers and prepare samples. BLI experiments are set up with one molecule immobilised on the surface of the biosensor (load sample) and a second molecule in solution (the analytical sample).
2. Fix the load sample on the biocompatible biosensor while the analytical sample is in solution.
3. The biosensor tip is immersed in the solution so that the target molecule begins to bind to the analysis sample.
4. Set up and run the BLI experiment. Molecules bound to or dissociated from the biosensor can generate response curves on the BLI system; unbound molecules, changes in the refractive index of the surrounding medium or changes in flow rate do not affect the interferogram pattern.
5. Collect and analyse data on the BLI's system.

Materials

• Equipment: Fortebio Bio-Layer Interferometry (BLI)
• Sample Type: DNA, RNA, Protein, Antibodies, Peptides, Small Molecules
• Optionals: Q5 Site-Directed Mutagenesis Kit, Expi293 cells
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