Flashcards
BCH 400 CH 4 Protein structure
Cards in this deck (19)
- 1The three dimensional structure of a protein is determined by?The AA sequence of the protein (primary structure)
- 2Oxytocina hormone that induces labor contractions and lactation
- 3Vasopressina hormone that stimulates contractions of various smooth muscles (helps regulate blood pressure)
- 4what are some modified AAs?Hydroxyproline, Hydroxylysine and Thyroxine
- 5Which is energetically favorable, breaking down a peptide bond or making one?breaking down a peptide bond (Hydrolysis) is energetically favorable, it takes energy to do the opposite
- 6What is a good catalyst for hydrolysis?A strong mineral acid, such as 6M HCl
(Note:All mineral acids form hydrogen ions and the conjugate base ions when dissolved in water. Commonly used mineral acids are sulfuric acid, hydrochloric acid and nitric acid) - 7What determines a proteins function?The protein's three dimensional structure
- 8Types of secondary structures:alpha helix, beta sheet, loops and turns
- 9What causes a planar geometry in a peptide bond?The double bond
- 10What is the name of the mathematical technique that helps predict what types of protein folding conformations are present in a secondary structure?Ramachandran Plots
- 11In a polypetide an amino Hydrogen H-bonds with carbonyl oxygen located how many AAs away?4 AAs away
- 12The leucine zipper is an example of?an alpha helix
- 13What type of beta sheets are the most stable?Antiparallel beta sheets
- 14What are turns in regards to secondary protein structure?turns are referred to loops with less than five AAs (beta turns are common)
- 15Which AAs are prevalent in beta turns (reverse turns)?proline and glycine
- 16Fibrous proteins-insoluble (hydrophobic)
-strong but flexible
-have structural role - 17Examples of Fibrous proteinsCollagen and keratin
- 18Characteristics of globular proteins-spherical or globular form
-hydrophilic (water soluble)
-diverse functions (enzymes,regulatory proteins) - 19Example of globular proteinCatalase
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- Flashcards on BCH 400 CH 4 Protein structure, created by Amanda Flores on 31/01/2015.
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- Amanda Flores
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