Biochemistry 2280A Lecture Notes - Lecture 3: Carboxylic Acid, Oligopeptide, Protein Folding

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copperwasp664

14 Dec 2017

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Document Summary

Net charge of amino acids: to find overall net charge, need to add up net charge of all ionisable groups at a given ph, example: asp at ph 7. All proteins are polypeptides but not all polypeptides are proteins. Primary structure (aa sequence): (amino acid sequence: dictates secondary, tertiary and quaternary structures, possess all information required. Hydrogen bonds form when a hydrogen atom is sandwiched between two electron-attracting atoms (usually o or n). Strongest when the three atoms are in a straight line. 1/20th of the strength of a covalent bond. 2o structure: the: spiral structure bone atoms, about 3. 6 amino acids, h bonds are key to. Example of a protein containing alpha helical structure: haemoglobin. Ompg (beta barrel)- pore forming bacterial membrane protein: allows things to pass through membrane that usually doesn"t. This channel can open and close using a signal. Concerns the 3-d arrangement of a single polypeptide chain.

Related Questions

1. Polypeptide strands is the active form of a digestive enzyme in the stomach that breaks polypeptide chains into smaller polypeptides.

2. Cleavage of proteins by pepsin in the stomach results in formation of pepsinogen which get broken down further in the small intestine.

3. An amino acid chain made up of three amino acids joined together is called a tripeptide.

4. Dipeptide describes an amino acid chain made up of two amino acids joined together.

5. The 20 different amino acids are the building blocks used for protein synthesis.

6. Amino acid pools are stockpiles found in the blood and other cells of the body that can be used to build new proteins.

7. The continual process of degrading and synthesizing protein is called protein turnover.

8. The stomach produces pepsin, which denatures protein.

9. Denaturation occurs when a protein is exposed to heat, acid, bases, or mechanical agitation resulting in unfolding of the protein, though the peptide bonds remain intact.

10. The part of an amino acid that contains nitrogen is called the amine group.

11. The acid group is also known as the carboxyl group.

12. Single amino acids that are absorbed in the small intestine travel to the liver via the portal vein.

Please correct these sentences AS SOON AS POSSIBLE.. Some of them are not correct and I didn't figure out what are they!

violetdog828

For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once. Proteins are ______________ built from amino acids, which each have an amino group and a _____________ group attached to the central _______________. There are twenty possible _______________ that differ in structure and are generally referred to as âR.â In solutions of neutral pH, amino acids are _______________, carrying both a positive and negative charge. When a protein is made, amino acids are linked together through _______________, which are formed by condensation reactions between the carboxyl end of the last amino acid and the ___________________ end of the next amino acid to be added to the growing chain.