Proteins are linear polymers of amino acids NH2000000 COOH Amino acids Terminology: Residues-amino acids in proteins Dipeptide-a peptide containing two amino acids Polypeptide-a peptide containing more than a dozen amino acids Monomer-a protein containing a single polypeptide Multimers-a protein containing more than one polypeptide Homodimer-a protein contain two identical polypeptide Heterodimers-a protein contain two different polypeptide Tetramers-a protein containing four polypeptides(can be homo-or hetero-) For a polypeptide of N amino acids,there is 20N possible amino acid sequences.Thus there is virtually unlimited number of amino acid sequencesProteins are linear polymers of amino acids Terminology: Residues-amino acids in proteins Dipeptide-a peptide containing two amino acids Polypeptide-a peptide containing more than a dozen amino acids Monomer -a protein containing a single polypeptide Multimers-a protein containing more than one polypeptide Homodimer-a protein contain two identical polypeptide Heterodimers-a protein contain two different polypeptide Tetramers-a protein containing four polypeptides (can be homo- or hetero-) For a polypeptide of N amino acids, there is 20N possible amino acid sequences. Thus there is virtually unlimited number of amino acid sequences NH2 COOH Amino acids