Caption: Primary Structure of Proteins
Text: The primary structure refers to the specific sequence of amino acids which are linked together by covalent peptide bonds to form a polypeptide chain. The primary structure of each protein is ultimately dictated by the specific sequence of nucleotides in the gene that coded for the protein. This sequence of nucleotides establishes the sequence of nucleotides in the messenger RNA during "transcription", and the sequence on the messenger RNA establishes the type and order of amino acids that will be bonded in a serial fashion at ribosomes during "translation".