Structural analysis of β turns in peptides and proteins by Circular Dichroism (CD) (CAT#: STEM-MB-0625-WXH)

Introduction

β-Turns are one of the most common structural motifs in proteins and change the direction of the peptide backbone by nearly 180°, allowing the peptide chain to fold back onto itself.

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Principle Applications Procedure Materials

Principle

Circular dichroism (CD) is a spectroscopy technique that measures the absorption difference between left and right circularly polarized light. By symmetry, this asymmetric absorption can only occur for asymmetric molecules, meaning chiral molecules.

Applications

Circular dichroism (CD) spectroscopy is a powerful technique that is sensitive to the chirality (handedness) of molecules. It can be used to study absolute stereochemistry, enantiomeric composition, racemization, enantiomeric differentiation, and molecular interactions and conformation.

Procedure

1. Sample preparation
2. Measurement by CD instrument
3. Data analysis

Materials

Circular dichroism (CD) spectrophotometer

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