In cellular membranes, the arrangement and composition of lipids play a crucial role in maintaining the structural integrity and functionality of the membrane. One of the key classes of lipids found in biological membranes is phospholipids, which consist of hydrophilic (water-loving) heads and hydrophobic (water-fearing) tails. Among various phospholipids, sphingomyelin stands out due to its unique structure and properties.
Which statement below best differentiates sphingomyelin from other common phospholipids found in cellular membranes?