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Chapter 7

BIL 250 Chapter Notes - Chapter 7: Hemoglobin, Transversion, Purine


Department
Biology
Course Code
BIL 250
Professor
Kevin Mc Cracken
Chapter
7

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Protein
One or more polypeptides (made of AA)
Amino Acid Composition:
Amino (+)
Carboxyl (-)
Hydrogen
R group: GIVES UNIQUE CHEMICAL PROPERTY
AA Chemical Groups:
Acidic (n = 2)
Basic (n=3)
Neutral & Polar (Hydrophilic) (n=6)
Neutral & Non-polar (Hydrophobic) (n=9)
Peptide Bonds = Dehydration Synthesis
Covalent bond between carboxyl of one AA and amino of next AA
N terminus at BEGINNING {AMINO}
C terminus at END {CARBOXYL}
STRUCTURE:
Primary- AA sequence, determined by genetic code of mRNA
Secondary- folding & twisting -> b-pleated sheet & a-helix
Tertiary- 3D shape of single PP chain -> b/c R groups
Quaternary- Two + PP (hemoglobin)
CODE
Triplet
64 CODONS
20 AA
Non-overlapping
Degenerate
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