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Alleles are different versions of gene that code for same trait
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Different genotypes code for different phenotypes
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Primary structure
- Chain of amino acids
- Uses peptide bonds
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Secondary structure
- Alpha helices or beta pleated sheets
- Uses hydrogen bonds
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Tertiary structure
- Ionic bonds between positive and negative amino acids
- Covalent bonds between cysteine amino acids
- LDFs repelling hydrophobic amino acids
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Quaternary structure
- Multiple folded chains held together by IMFs
- Same interaction types as tertiary structure