Investigations of Intermolecular Interactions of Bile Pigments with Small Proteins by UV-Vis Spectroscopy (CAT#: STEM-MB-0962-WXH)

Name: Investigations of Intermolecular Interactions of Bile Pigments with Small Proteins by UV-Vis Spectroscopy
SKU: STEM-MB-0962-WXH
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Introduction

Bile pigments in their native states are frequently in close interaction with proteins. In the animal kingdom, for example, the transport proteins of serum albumin type or the bile pigment binding protein in Pieris brassicae form noncovalent complexes. In plants, bile pigments are covalently attached to the protein in the phycobiliproteins and in phytochrome.

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Principle Applications Procedure Materials

Principle

UV-Vis spectroscopy is an analytical technique that measures the amount of discrete wavelengths of UV or visible light that are absorbed by or transmitted through a sample in comparison to a reference or blank sample. This property is influenced by the sample composition, potentially providing information on what is in the sample and at what concentration. The only requirement is that the sample absorb in the UV-Vis region, i.e. be a chromophore. Absorption spectroscopy is complementary to fluorescence spectroscopy. Parameters of interest, besides the wavelength of measurement, are absorbance (A) or transmittance (%T) or reflectance (%R), and its change with time.

Applications

UV/Vis spectroscopy is routinely used in analytical chemistry for the quantitative determination of diverse analytes or sample, such as transition metal ions, highly conjugated organic compounds, and biological macromolecules. Spectroscopic analysis is commonly carried out in solutions but solids and gases may also be studied.