In adults, eczema occurs most frequently on the hands and elbows, and in bending areas such as the inside of the elbows and back of the knees. In young children, eczema is often seen on the elbows, knees, face, neck, and scalp. Signs and symptoms of atopic eczema include: 1  Itchiness. 2  Skin redness.
Sphingolipids are composed of a backbone of sphingosine which is derived itself from glycerol. Sphingosine is N-acetylated by a variety of fatty acids generating a family of molecules referred to as ceramides. Sphingolipids predominate in the myelin sheath of nerve fibers.
Phospholipid monomers include two fatty acids and one glycerol molecule in a structure similar to diglycerides. Attached to the third hydroxyl of glycerol is a unique monomer containing a phosphate group. The fatty acid segment, or âtail,â of a phospholipid lacks polarity and is strongly hydrophobic.hospholipid monomers include two fatty acids and one glycerol molecule in a structure similar to diglycerides. Attached to the third hydroxyl of glycerol is a unique monomer containing a phosphate group. The fatty acid segment, or âtail,â of a phospholipid lacks polarity and is strongly hydrophobic.