Generation and characterization of a monoclonal IgG antibody to polyethylene glycol.

An IgG mouse monoclonal antibody (10F05) against polyethylene glycol has been generated. The antibody reacts with PEG regardless of the linker used for PEG attachment, and is able to recognize a PEGylated peptide in plasma at concentrations as low as 3 pg/mL. The antibody is readily purified in substantial quantities.

High-throughput mass spectrometry screening for inhibitors of phosphatidylserine decarboxylase.

A high-throughput mass spectrometry assay to measure the catalytic activity of phosphatidylserine decarboxylase (PISD) is described. PISD converts phosphatidylserine to phosphatidylethanolamine during lipid synthesis. Traditional methods of measuring PISD activity are low throughput and unsuitable for the high-throughput screening of large compound libraries.

A High-throughput two-phase partition assay to measure the activity of lipid-metabolizing enzymes.

A new method to measure the activity of lipid-metabolizing enzymes is described. Subsequent to an enzymatic reaction, a two-phase system (organic/aqueous) is established by the addition of a phase partition scintillation fluid (PPSF). The PPSF serves as a scintillation fluid, a phase partition agent, and a carrier/separator of an organic-soluble radiolabeled reaction substrate or product.