Protein & enzymes

4. structure resulting from the association of multiple polypeptide subunits.
5. level of protein structure referring specifically to the sequence of amino acids.
7. Bond, The covalent bond formed between two amino acids during polymerization.
10. that help proteins fold into their correct functional shapes.
11. A type of inhibition where the end product of a pathway shuts down an earlier step.
14. specific reactant(s) that an enzyme acts upon.
16. Site, The unique region of an enzyme where the substrate binds.
17. type of inhibitor that blocks the active site directly.
18. A type of regulation where an activator or inhibitor binds to a site other than the active site.
19. A chain of 20 or more amino acids.

1. Energy, Often written as EA, this is the energy required to start a chemical reaction.
2. reaction helper, such as an ion, required for enzyme activity.
3. cellular structure that acts as an enzyme to facilitate peptide bond formation.
6. Helix, A spiral-shaped secondary protein structure held together by hydrogen bonds.
8. Sheet, A back-and-forth secondary protein structure (beta-sheet).
9. process where a protein unfolds and loses its higher-order structure due to heat or pH.
12. speed up a chemical reaction in a timely manner using an enzyme.
13. An organic reaction helper, such as NAD+
15. Acid, The monomer unit of proteins; there are 20 unique types.