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Bio Definitions 3.2

Textbook Definitions

TermDefinition
Primary Structure Sequence of amino acids in a polypeptide chain, unfunctional, protein 1st stage
Secondary Structure Folding and coiling of primary structure, repeating configuration, alpha helix and beta pleated sheets, unfunctional, protein 2nd stage
Alpha Helix Second structure in a protein, polypeptide backbone spiral shape, h-bonds
Beta Pleated Sheet Second structure in protein, polypeptide backbone, folds into sheet-like shape, h-bond
Tertiary Structure 3-D interaction b/tw amion acid chain and R group, mutli-bonds, built from secondary structure, weaves and coils around, protein 3rd stage
Disulfide Bonds “Two sulfur” covalent bond, typically in the side chains, contribute to tertiary & quaternary levels
Quaternary Structure Result from aggregation of two or more polypeptide subunits, big from multi-little
Macromolecular Machines Group of proteins and nucleic acid that assemble to carry out a particular function
Polypeptide Amino acid chain > 50 residues, “many peptide”
Oligopeptide Amino acid chain < 50 residues, “few peptide”, aka peptide
Created by: KimbaPasch
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