why glycine, the simplest amino acid, is different from all of the other standard amino acids in that it
What is Glycine. Amongst the 22 amino acids vital for our body to function and manufacture proteins, glycine is the smallest and simplest, with only a single hydrogen forming its side chain. Abbreviated at G or Gly, this amino acid has the chemical formula NH2CH2COOH. Itâs the second most widespread amino acid found in human enzymes and proteins. buy the TOP-SELLING L-glycine supplement on amazon.com. Glycine is biosynthesised in the liver from the amino acids, serine and threonine. As a solid, itâs a sweet tasting crystalline substance and the principle amino acid within cane sugar. In humans, itâs found in high concentrations within the skin, connective tissues and muscle tissues.