Cultured marble is less expensive and is made from real chips of natural marble embedded in plastic. It's available in sheet form and in standard counter dimensions of 19 and 22 inches deep. Cultured marble comes with or without a wash basin molded into it, for $50 to $80 per running foot, installed.
The Chemistry of Biology: Proteins. Proteins. Proteins are organic compounds that contain the element nitrogen as well as carbon, hydrogen, and oxygen. Proteins are the most diverse group of biologically important substances and are often considered to be the central compound necessary for life.
Protein Structure and Function . A protein is a functional biological molecule that is made up of one or more polypeptides that are folded/coiled into a specific structure . Proteins are important macromolecules that serve as structural elements, transportation channels, signal receptors and transmitters, and enzymes.