👉 Phosphatidic acid is a type of fatty acid that appears in various cellular structures, including neurons, muscle cells, and certain types of cells in the immune system. It has been identified as an essential component of cell membranes and also plays a role in the transport of substances between different compartments within the body. In summary, phosphatidic acid is a type of fatty acid that appears in various cellular structures and plays a vital role in the transport of substances between different compartments within the body