POPC is a chemical compound. It is a diacylglycerol and phospholipid

Phospholipid

Phospholipids are a class of lipids that are a major component of all cell membranes as they can form lipid bilayers. Most phospholipids contain a diglyceride, a phosphate group, and a simple organic molecule such as choline; one exception to this rule is sphingomyelin, which is derived from...

. The full name is 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine. It is an important lipid

Lipid

Lipids constitute a broad group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins , monoglycerides, diglycerides, triglycerides, phospholipids, and others...

 for biophysical experiment and has been used to study various subjects such as lipid raft

Lipid raft

The plasma membrane of cells is made of a combination of glycosphingolipids and protein receptors organized in glycolipoprotein microdomains termed lipid rafts...

s. It is available commercially synthetically and is naturally present in eukaryotic cell membranes.