Analytical Testing
Analytical Testing
Video
GEN Protocols Expert Exchanges: COVID-19 Immunodiagnostic Test Identifies Antibody Source
Need another COVID-19 booster?A new immunodiagnostic test called PictArray helps you decide. The test tells you exactly where your antibodies to the virus are coming from - whether your antibodies are from vaccines or SARS-CoV-2 infections, or both. The test detects SARS-CoV-2 antigens--both spike p... More
Mixer
Cell Therapy Development: Tackling Analytic Challenges
Cell therapy products are an exciting new class of medicinal products that offer opportunities to treat and cure diseases that cannot be treated using conventional therapeutic options. The development and manufacturing of cell therapy products pose several challenges compared to other biologics. Yet... More
Primer
Assessing Protein Purity: Many Tests, Many Assays
Proteins provide structure to cells, catalyse enzymatic reactions, transport cargo, replicate DNA, metabolise nutrients among an array of other functions. Composed of amino acids and generally featuring a three-dimensional structure, proteins form key therapeutic and diagnostic tools as antibodies o... More
Primer
Two Critical Steps to Success in Multicolor Flow Cytometry
Flow cytometry is a powerful tool to analyze and characterize cells based on their protein expression, most often those expressed on the cell surface. Multicolor flow cytometry uses multiple fluorochromes as primary or secondary antibody conjugates to label cells. The capacity for modern flow cytome... More
Primer
Considerations when Selecting a Matrix for MALDI
One of the most widely utilized techniques in mass spectrometry imaging (MSI) is label-free MALDI (Matrix-Assisted Laser Desorption Ionization), which can be coupled to a variety of mass analyzers to create brilliant molecular maps. Application targets include lipids, proteins, peptides, drugs, and ... More
Primer
Is Your Flow Cytometer Reliable?
Flow cytometry provides a useful method by which scientists can measure and analyse different properties of individual cells, including size, internal complexity (granularity) and the presence of cell surface and intracellular markers using fluorescence. Flow can help identify individual cell subpop... More
Primer
Unwanted Fungi: Detecting Microbial Cell Culture Contamination
Coming into the lab and spotting an obvious fungal growth, or the tell-tale signs of cloudy media, can be a stressful experience for researchers. When carrying out cell culture in the lab, contamination from microbial agents such as bacteria and fungus can occur and have disastrous effects on ongoin... More
Primer
Benefits of Using an Electronic Laboratory Notebook
Electronic laboratory notebooks (ELNs) were developed to keep track of experiments and data so that scientists could review their work in a single place and easily reproduce experiments. Many ELNs started out as electronic versions of paper lab notebooks. Now, the most advanced ELNs offer an extensi... More
Primer
Quick Antibiotic Susceptibility Test for High-Threat Pathogens in Whole Blood Samples
By spreading so rapidly and wreaking so much havoc, COVID-19 has revealed the susceptibility of global societies to both natural pathogens and intentionally released bioterror agents. The latter include bacteria that have been engineered for enhanced antibiotic resistance.1 Once pathogenic bacteria ... More
Primer
Bio-Electrospraying and Cell Electrospinning: A Sea of Applications
Electrospraying and electrospinning have been used for a wide range of applications ranging from coatings, propulsion, and pesticide sprays to scaffolding a wide range of advanced materials for applications in filtration and tissue engineering. Although electrospun scaffolds have been explored as ti... More
Protocol
Skin Freezing Technique for Living Cell Bank
Cell banks are especially important sources of studies for which living cells are needed, as well as a repository of genetic diversity in natural populations. We propose a simple protocol for field research that can maintain viable skin cells for in vitro replication and production of fibroblast lin... More
Protocol
Protein Aggregate Identification with FMM: Rapidly Distinguish Protein from Non-Protein Particles in Biologic Formulations
Don’t rely on unreliable morphology characteristics or refractive index to determine if particles in your formulation are protein or non-protein. Aura systems are the only particle analyzer that combines fluorescence membrane microscopy (FMM) with backgrounded membrane image (BMI) to give you defini... More
Protocol
High-Throughput Detection of Degraded Polysorbate in Biological Formulations with FMM
Excipients like polysorbate are used in the majority of biologic products to improve stability. However, the polysorbate itself can degrade, impairing the stability of the API and contributing an additional aggregate source that can elicit an immunogenic response. Traditionally, monitoring only poly... More
Protocol
AAV Aggregate Quantitation and Identification with the Aura System
Adeno-associated viruses (AAVs) have made the promise of gene therapy a reality by enabling safe, targeted delivery of curative genetic payloads. The formation of aggregated viral vector is an important critical quality attribute to measure because they lead to adverse immunogenic events and are an ... More
Protocol
Detect Specific Protein Aggregates in Biologic Formulations with the Aura Immunoassay
Biologic co-formulations target multiple pharmacologically active sites to increase therapy efficacy. However, either biologic can be a source of protein aggregation that can negatively influence the product’s safety, efficacy, and therapy. Aura systems are the only particle analyzer that can pinpoi... More
Protocol
Evaluate Cell Therapy Product Purity with Aura CL
The CAR-T development workflow is a multi-step process that includes transfection of T cells with a viral vector to express a chimeric antigen and activation/expansion of the CAR-T using a molecule like a Dynabead conjugated to CD3/CD28. Each of these steps is a potential source of contamination tha... More
Protocol
USP Particle Count Standards with Aura and Particle Vue 3.1
All membrane microscopy methods must generate accurate and reproducible counts for bead counting standards. We present a validated methodology for accurately counting United States Pharmacopeia (USP) microsphere count standards on Aura systems by seamlessly calculating the cumulative area of all the... More
Protocol
USP Compendial Particle Measurements with the Aura System
The Aura platform provides a rapid and robust USP 788 compendial method for subvisible particle analysis, a critical quality attribute. It can handle a wide range of sample types and can analyze anywhere from 5 µL to 10 mL of sample, enabling continuity of method from developability assessment to lo... More
Protocol
Removal of rare undifferentiated induced pluripotent stem cells (iPSCs) by multi-step negative sorting
In the field of regenerative medicine involving ES or iPS cells, differentiated cells are often cultured to tissues and implanted to patients. However, there is an unneglectable problem that some remaining undifferentiated cells in the implanted tissue may cause tumors. Therefore, a complete removal... More
Protocol
Cell culture CO2 incubator decontamination process using hydrogen peroxide vapor for highly regulated and general cell culture protocols
The value of the laboratory cell culture incubator used in highly regulated research and clinical protocols is directly related to the proportion of incubator uptime vs. downtime in applications where frequent interior chamber decontamination is required or desired. The need for interior decontamina... More
Primer
Assessing Protein Purity: Many Tests, Many Assays
Proteins provide structure to cells, catalyse enzymatic reactions, transport cargo, replicate DNA, metabolise nutrients among an array of other functions. Composed of amino acids and generally featuring a three-dimensional structure, proteins form key therapeutic and diagnostic tools as antibodies o... More
Primer
Two Critical Steps to Success in Multicolor Flow Cytometry
Flow cytometry is a powerful tool to analyze and characterize cells based on their protein expression, most often those expressed on the cell surface. Multicolor flow cytometry uses multiple fluorochromes as primary or secondary antibody conjugates to label cells. The capacity for modern flow cytome... More
Primer
Considerations when Selecting a Matrix for MALDI
One of the most widely utilized techniques in mass spectrometry imaging (MSI) is label-free MALDI (Matrix-Assisted Laser Desorption Ionization), which can be coupled to a variety of mass analyzers to create brilliant molecular maps. Application targets include lipids, proteins, peptides, drugs, and ... More
Primer
Is Your Flow Cytometer Reliable?
Flow cytometry provides a useful method by which scientists can measure and analyse different properties of individual cells, including size, internal complexity (granularity) and the presence of cell surface and intracellular markers using fluorescence. Flow can help identify individual cell subpop... More
Primer
Unwanted Fungi: Detecting Microbial Cell Culture Contamination
Coming into the lab and spotting an obvious fungal growth, or the tell-tale signs of cloudy media, can be a stressful experience for researchers. When carrying out cell culture in the lab, contamination from microbial agents such as bacteria and fungus can occur and have disastrous effects on ongoin... More
Primer
Benefits of Using an Electronic Laboratory Notebook
Electronic laboratory notebooks (ELNs) were developed to keep track of experiments and data so that scientists could review their work in a single place and easily reproduce experiments. Many ELNs started out as electronic versions of paper lab notebooks. Now, the most advanced ELNs offer an extensi... More
Primer
Quick Antibiotic Susceptibility Test for High-Threat Pathogens in Whole Blood Samples
By spreading so rapidly and wreaking so much havoc, COVID-19 has revealed the susceptibility of global societies to both natural pathogens and intentionally released bioterror agents. The latter include bacteria that have been engineered for enhanced antibiotic resistance.1 Once pathogenic bacteria ... More
Primer
Bio-Electrospraying and Cell Electrospinning: A Sea of Applications
Electrospraying and electrospinning have been used for a wide range of applications ranging from coatings, propulsion, and pesticide sprays to scaffolding a wide range of advanced materials for applications in filtration and tissue engineering. Although electrospun scaffolds have been explored as ti... More
Primer
Techniques to Detect Unusual Nucleic Acid Structures
Guanine quadruplexes (G-quadruplexes or G4s) are unusual nucleic acid structures with distinct biological and chemical functions. They have occupied significant attention in the nucleic acid world since they were first identified in 1962 as the basis for the aggregation of 5’-guanosine monophosphate... More
Primer
Cloning Mice From Freeze Dried Somatic Cells
As species continue to face massive extinction, preserving genetic material through judicious biobanking to enable cloning is key to promoting the survival of species and maintaining biodiversity.Embryos and germ cells are commonly stored at ultra-low temperatures in liquid nitrogen. But storing rep... More
Mixer
Cell Therapy Development: Tackling Analytic Challenges
Cell therapy products are an exciting new class of medicinal products that offer opportunities to treat and cure diseases that cannot be treated using conventional therapeutic options. The development and manufacturing of cell therapy products pose several challenges compared to other biologics. Yet... More
Video
GEN Protocols Expert Exchanges: COVID-19 Immunodiagnostic Test Identifies Antibody Source
Need another COVID-19 booster?A new immunodiagnostic test called PictArray helps you decide. The test tells you exactly where your antibodies to the virus are coming from - whether your antibodies are from vaccines or SARS-CoV-2 infections, or both. The test detects SARS-CoV-2 antigens--both spike p... More
Featured Content
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Primer
Techniques to Detect Unusual Nucleic Acid Structures -
Protocol
Predictive Low-Glucose Suspend Necessitates Less Carbohydrate Supplementation to Rescue Hypoglycemia: Need to Revisit Current Hypoglycemia Treatment Guidelines -
Protocol
Preparing a Brain-Mimetic 3D Matrix for Culturing Human Pluripotent Stem Cells -
Protocol
Radiolabelling Nucleic Acids with [γ-32P] ATP for Analytical Assays -
Protocol
USP Compendial Particle Measurements with the Aura System - More