Receptor: 1. In cell biology, a structure on the surface of a cell (or inside a cell) that selectively receives and binds a specific substance. There are many receptors.
The most common is EPNS (Electro Plated Nickel Silver) but many other symbols are used: 1  EPBM (Electro Plated Britannia Metal). 2  EPCA (Electro Plated Copper Alloy). 3  ESM (Electro Plated Silver Mounts).he most common is EPNS (Electro Plated Nickel Silver) but many other symbols are used: 1  EPBM (Electro Plated Britannia Metal). 2  EPCA (Electro Plated Copper Alloy). 3  ESM (Electro Plated Silver Mounts).
EPNS A1 is the highest grade of silver plating that the manufacturer provides. EPNS = Electroplated Nickel Silver A1 = the thickness of the silver plating which is usually â¦ 30 - 35 Microns.Highest Grade of Silver plating.The higher the grade, the longer the cutlery will last.PNS = Electroplated Nickel Silver A1 = the thickness of the silver plating which is usually â¦ 30 - 35 Microns. Highest Grade of Silver plating. The higher the grade, the longer the cutlery will last.