Phospholipids are a class of lipids which constitute a major component of cell membranes and play important roles in signal transduction. Most phospholipids contain one diglyceride, a phosphate group, and one choline.
In this assay, phospholipids (such as lecithin, lysolecithin and sphingomyelin) are enzymatically hydrolyzed to choline which is determined using choline oxidase and a H2O2-specific dye. This results in a colorimetric (570 nm)/ fluorometric (λex = 530/λem = 585 nm) product directly proportional to the phospholipid concentration in the sample. The range of linear detection is 3 - 200 μM for colorimetric assays and 0.6 - 20 μM for fluorometric assays.
