Antigenic variation can occur by altering a variety of surface molecules including proteins and carbohydrates.

However in nanoparticles, surface molecules do not obey the expected configuration in space.

The surface molecules of a liquid are pulled sideways, but attractions from underneath also pull them down into the liquid.

This pulling of surface molecules into the liquid causes the surface to contract and become as small as possible.

It makes no effect inside the material, but surface molecules are attracted into the material from the surface.

A surface molecule of the white material cannot hold the energy long enough to build a photon of light.

The skin cells also produced certain surface molecules, known as receptors, that are characteristic of immune cells.

Each person has a combination of two of these surface molecules.

The surface molecules of a liquid, drawn to each other and pulled down by those below, behave like a stretched elastic membrane.

This process becomes much more intriguing when taking into account that commensals often share their surface molecules with pathogens.