PT Proteins - 3.5 Proteins Proteins polymers found in all...

Info icon This preview shows pages 1–2. Sign up to view the full content.

3.5 Proteins Proteins – polymers found in all cells and play critical roles in nearly all life processes. Peptide Bond - covalent bond formed between a carboxyl and amino group Polypeptide – when many amino acids are joined by peptide bonds (average 300-500 amino acids in length) Amino Acids Building blocks of proteins 20 amino acids distinguished by side chains Joined together by a dehydration reaction that links the carboxyl group of one amino acid to the amino group of another Categories: Nonpolar Polar (uncharged) Polar (charged) Structure: 1 carbon atom (α-carbon) linked to an amino group (NH 2 ), a carboxyl group (COOH), hydrogen, and a side chain (R). Proteins are polymers of amino acids All amino acids (except glycine) exist in more than one isomeric form. D & L Forms (enantiomers) Only L-amino acids and glycine are found in proteins D-isomers are found in the cell walls of bacteria.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern