Phosphatidylcholines

300px|thumb|right|class=skin-invert-image|1-Oleoyl-2-palmitoyl-phosphatidylcholine

chemical compound

Dipalmitoylphosphatidylcholine (DPPC) is a phospholipid (and a lecithin) consisting of two C16 palmitic acid groups attached to a phosphatidylcholine head-group.

POPC (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine) is a phosphatidylcholine. It is a diacylglycerol phospholipid. It is an important phospholipid for biophysical experiments and has been used to study various subjects such as lipid rafts. POPC is also used in systems mimicking the cell membrane such as Nanodiscs. It is available commercially and is naturally present in eukaryotic cell membranes.

Distearoylphosphatidylcholine is a phosphatidylcholine, a kind of phospholipid. It is a natural constituent of cell membranes, eg. soybean phosphatidylcholines are mostly different 18-carbon phosphatidylcholines (including minority of saturated DSPC), and their hydrogenation results in 85% DSPC. It can be used to prepare lipid nanoparticles which are used in mRNA vaccines, In particular, it forms part of the drug delivery system for the Moderna and Pfizer COVID-19 vaccines.