Several classes of complex lipids devoid of phosphorus have one amino acid linked to both a long-chain alcohol and a fatty acid or to a glycerolipid, they are sometimes named lipoamino acids. Simple forms of these lipoamino acids containing only amino acid and fatty acid(s) are described in the "simple lipids" part.
They are present exclusively in Bacteria and lower plants (fern, algae, protozoa).
Two groups of complex lipoamino acids are known:
1 - Lipids having an amino acid with N-acyl and/or ester linkages
2 - Lipids having a glycerol and an amino acid with ether linkage