Notes: A brief cure in salt and sugar not only adds flavor to the shrimp and makes them more tender but also acts as a mild preservative for transporting them. You can assemble the skewers through step 2 up to 1 day ahead; cover and chill. Prep and cook time: about 1 hour, plus at least 45 minutes to cure.
Amino acids play central roles both as building blocks of proteins and as intermediates in metabolism. The 20 amino acids that are found within proteins convey a vast array of chemical versatility. The precise amino acid content, and the sequence of those amino acids, of a specific protein, is determined by the sequence of the bases in the gene that encodes that protein. The chemical properties of the amino acids of proteins determine the biological activity of the protein. Proteins not only catalyze all (or most) of the reactions in living cells, they control virtually all cellular process.
Proteins are made from building blocks known as amino acids. There are 20 different amino acids. Some amino acids can be made in the body and others can only be supplied by the diet-these are known as the essential amino acids.