Phycocyanin
| Phycocyanin | ||
|---|---|---|
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| Allophycocyanin 12-mer according to PDB 1all |
Phycocyanin (PC) belongs to the phycobilins and acts as an accessory pigment in photosynthesis in cyanobacteria (blue-green algae), but is also found in red algae and glaucophyta . Phycocyanin appears purple to cobalt blue in color .
Its absorption maximum is in blue-green algae ( Aphanizomenon flos aquae ) at a wavelength of 615 nm. In various red algae its absorption spectrum has two peaks, with maxima around 550 nm and - more pronounced - at 615 nm.
The blue chromophoric group in phycocyanin is phycocyanobilin . It is covalently linked to the protein backbone of the phycocyanin via an L - cysteine .
Individual evidence
- ↑ Hans-Werner Heldt and Birgit Piechulla: Plant biochemistry . Spectrum Academic Publishing House; 4th edition 2008; ISBN 978-3-8274-1961-3 ; P. 63.
- ^ A b Colyer, CL. et al. (2005): Analysis of cyanobacterial pigments and proteins by electrophoretic and chromatographic methods . In: Anal Bioanal Chem. 382 (3); 559-569; PMID 15714301 ; doi : 10.1007 / s00216-004-3020-4 .