This app note reviews the development of the OligoWorks SPE Microplate Kit and detergent-free protocol for oligonucleotide bioanalysis and demonstrates performance across a broad range of chemically diverse oligonucleotides, including GalNAc and lipid-conjugated species. The analytical testing and screening work to optimize the protocol for high recovery and low matrix effects is discussed in detail and LC-MS data is presented for spiked plasma and urine samples showing excellent inter and intra-kit, day-to-day and user-to-user reproducibility (RSDs ≤15%).
New Strategies for a Better Glycosylation Profile
January 22nd 2025Glycan analysis provides key information on critical quality attributes that could affect stability, safety and efficacy of a protein therapeutic. Specific needs for understanding the glycosylation profiles change throughout the drug development process, but the requirement for high-resolution glycan information remains the same and is essential to help ensure product quality.