thumb|Phospholipid arrangement in cell membranes. thumb|Phosphatidylcholine is the major component of [[lecithin. It is also a source for choline in the synthesis of acetylcholine in cholinergic neurons.]]
Phospholipids are fatty molecules with a phosphate group attached that form the basic structural layer of cell membranes, arranged so their water-loving heads face outward and their water-repelling tails face inward. One important type called phosphatidylcholine makes up most of lecithin and helps produce acetylcholine, a chemical messenger in the brain and nervous system.
AI-generated from the Wikipedia summary — may contain errors.
thumb|Phospholipid arrangement in cell membranes. thumb|Phosphatidylcholine is the major component of [[lecithin. It is also a source for choline in the synthesis of acetylcholine in cholinergic neurons.]]
Phospholipids are a class of lipids whose molecule has a hydrophilic "head" containing a phosphate group and two hydrophobic "tails" derived from fatty acids, joined by an alcohol residue (usually a glycerol molecule). Marine phospholipids typically have omega-3 fatty acids EPA and DHA integrated as part of the phospholipid molecule. The phosphate group can be modified with simple organic molecules such as choline, ethanolamine or serine.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).