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PROTEIN (General information (abudant organic molecule, polymers of amino…
PROTEIN
Type and function
Hormone
secreted by endocrine
chemical-signaling molecules
Digestive enzyme
catalysts in biochemical reactions
complex or conjugated proteins
specific for the substrate
Shape
globular
fibrous
changed shape (loss of function)
Other type
Transport
Structural
Defense
Contractile
Storage
General information
abudant organic molecule
polymers of amino acids
macromolecule
diversity function
different shapes & molecular weights
Denaturation and Protein Folding
reversible denaturation
irreversible denaturation
chaperones (chaperonins)
critical to function of protein
Protein Structure
Primary
unique sequence
Secondary
α-helix
β-pleated sheet
formed by the local folding of polypeptide
Tertiary
three-dimensional structure
formed by the interactions among R groups
.
other reactions
hydrophobic interaction
disulfide linkage formation
Quaternary
formed by subunits
Amino acids
the monomers
20 amino acids present in proteins
polypeptide
the N terminal
the C terminal
posttranslational modifications
the same fundamental structure
R group
amino group
carboxyl group
hydrogen atom