CHAPTER 1: PROTEIN Content – Amino acid biosynthesis • Essential amino acid (EAA: ensentials) • Non essential amino acid (NEAA: nonessentials) • EAA biosynthesis • NEAA biosynthesis 04/25/2023 by TDLV 20 AMINO ACIDS 04/25/2023 by TDLV Polar R groups make the amino acid hydrophilic Non-polar R groups make the amino acid hydrophobic Ionic R groups make the amino acid hydrophilic AMINO ACID 04/25/2023 by TDLV GENETIC CODE 04/25/2023 by TDLV Modified or Unusual Amino Acids GENES AND PROTEINS 04/25/2023 Fig by TDLV The flow of genetic information in prokaryotes (left) and eukaryotes (right) 10