Amino acids are organic compounds that contain amino and carboxylic groups. In the form of proteins, amino acid residues form the second-largest component of human muscles and other tissues. Beyond their role as residues in proteins, amino acids participate in a number of processes such as neurotransmitter transport and biosynthesis.
Serine (HOCH2CH(NH2)COOH) is an essential amino acid. The correct Fisher projection od serine is: