Chapter 4-Protein Flashcards
Polypeptides consist of______ linked by a _____
-Amino Acids, Peptide bond
The peptide bond is also called an _________
-Amide bond
Each amino acid in a protein is called _______
-Residue
Which end of the polypeptide chain is taken as the beginning of the chain
-The Amino terminal end
Which end of the polypeptide chain is taken as the end of the chain
-The carboxyl terminal end
Disulfide bonds form by the oxidation of two _______
-Cystines
Secondary Structure is the ___________structure formed by __________between ________and ___ groups of amino acids
-3D,Hydrogen bonds peptide NH,CO
Each turn of the Alpha Helix is made of ___amino acids
-3.6
What is the Alpha Helix stabilized by ?
-Intrachain of Hydrogen Bonds
What is the Beta Sheets stabilized by ?
-Hydrogen bonding between polypeptide strands
Beta Sheets are formed by ________ beta strands
-Adjacent
What type of bonds link the strands in Beta sheets?
-Hydrogen Bonds
The strands of a Beta sheet may be, ______,________,or______
parallel ,antiparallel ,mixed
Fibrous Proteins provide _________ for cells and tissues
-Structural Support
what type of protein is a collagen?
Structural Protein
What are the helices in the collagen supported by?
Steric repulsion of the pyrrolidine rings of proline
How do they three intertwined chains in collagen interact with each other
Hydrogen Bonds
Tertiary Structure refers to the _____arrangement of _________ that are ________in the primary structure and to the pattern of ________bond formation
Spatial ,Amino Acids, far apart, disulfide
Tertiary structure is a result of?
Interactions between R groups of the peptide chain
The interior of globular proteins consists mainly of ________
Hydrophobic Amino Acids
The exterior of globular proteins consists of _________and________
Charged , Polar Amino Acids
What are Quaternary Structures?
Many polypeptide chains that come together
