Flashcards in peptide formation + structure Deck (100)
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1
stereochemistry of peptide bond
trans
2
true structure of peptide bond
resonance hybrid
3
which is stronger, peptide or single bond
peptide
4
which is longer, peptide or single bond
single
5
protein function
proteins accelerate thousands of biochemical reactions in the cell
catalysis
6
examples of proteins involved in catalysis
rubisco (photosynthesis)
hexokinase (first enzyme in glycolysis)
7
most abundant protein in earth
rubisco
8
first enzyme in glycolysis
hexokinase
9
protein function
some proteins provide protection and support
structure
10
ex of proteins for structure
collagen (connective tissue), elastin (elastic fibers), keratin (hair)
11
protein function
proteins are involved in all cell movements and muscle contraction
movement
12
– movement of sperm and protozoa
*dynein
13
protein function
various proteins have protective functions
Defense -
14
ex proteins for defense
keratin
immunoglobulins
15
protein function
various proteins regulate cellular processes
5. Regulation –
16
ex proteins for transport
glucose transporter
hemoglobin
LDL and HDL
transferrin
17
storage proteins containing 20 AA
Casein and ovalbumin
18
example of proteins for toxin
plant lectins, venom of snake
19
protein structure
the order or sequence of amino acids in the polypeptide chains
*Peptide bond is a covalent bond
primary
20
protein structure
conformation of the polypeptide backbone
2ndary
21
protein structure
arrangement in space of all atoms in the polypeptide chain
tertiary
22
protein structure
describes the interaction of the subunits in an oligomeric protein
*stabilized by both covalent & non-covalent forces
quaternary
23
levels of protein structure stabilized by covalent and non-covalent forces
quaternary and tertiary
24
has *intersubunit interaction
quaternary
25
has intrasubunit interaction
tertiary
26
what proteins have quaternary structure
only oligomericproteinswith ≥ 2 subunits
e.g. dimer
27
stabilizing force of secondary structure
H-bonding between the amide proton and carboxyl oxygen
28
the sequence of amino acids linked by peptide bonds.
▪ The backbone of a peptide chain or protein.
primary structure
29
Proteins are composed of ___ only
L-amino acids
30
