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B1.2 HL Protein Structure

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Total cards: 8•Content version: v3•Public deck•Updated: 8/1/2026

Card preview (8)

#1
Front (Question)

What is primary (1°) structure?

Back (Answer)

Linear sequence of amino acids linked by peptide bonds.

#2
Front (Question)

What is tertiary (3°) structure?

Back (Answer)

Overall 3D folding due to R-group interactions (ionic, disulfide, hydrophobic).

#3
Front (Question)

What is secondary (2°) structure?

Back (Answer)

Local folding into α-helices or β-pleated sheets stabilized by hydrogen bonds.

#4
Front (Question)

What is quaternary (4°) structure?

Back (Answer)

Association of multiple polypeptide chains (e.g. haemoglobin = 4 subunits).

#5
Front (Question)

What is a conjugated protein?

Back (Answer)

Protein with a non-polypeptide component (prosthetic group), e.g. haem group in haemoglobin.

#6
Front (Question)

What is a non-conjugated protein?

Back (Answer)

Protein made only of amino acid chains (e.g. insulin).

#7
Front (Question)

What methods determine protein structure?

Back (Answer)

X-ray crystallography, cryo-electron microscopy, and AI modeling (e.g. AlphaFold).

#8
Front (Question)

Keywords

Back (Answer)

primary, secondary, tertiary, quaternary, peptide bond, α-helix, β-sheet, disulfide bridge, prosthetic group, conjugated protein, denaturation.