Photostabilization of phycocyanin and anthocyanin in the presence of biopterin-α-glucoside from Spirulina platensis under ultraviolet ray
| Autor: | Kouji Fukui, Hiroki Ishikura, Yoshihiro Hada, Ayako Matsushim, Tetsuya Saito, Yoh Kodera, Yuji Inada |
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| Rok vydání: | 2003 |
| Předmět: |
Absorption spectroscopy
Process Chemistry and Technology General Chemical Engineering Chromophore medicine.disease_cause Photochemistry Fluorescence chemistry.chemical_compound Pigment Phycocyanobilin chemistry visual_art Phycocyanin visual_art.visual_art_medium medicine Ultraviolet light Ultraviolet |
| Zdroj: | Dyes and Pigments. 56:203-207 |
| ISSN: | 0143-7208 |
| Popis: | Biopterin-α-glucoside purified from Spirulina platensis is stable to irradiation by visible and ultraviolet light. Its absorption spectrum shows maxima at 268 nm and 340 nm and a fluorescence band appears at 447 nm. Although cyanidin-3-galactoside with an absorption maximum at 514 nm (red colour) is unstable and is decolourized by UV light, the pigment becomes stable in the presence of biopterin-α-glucoside. Similar photostabilization phenomenon was observed for phycocyanin (λ max 614 nm) consisting of phycocyanobilin as chromophore and protein subunits α 3 β 3 in the presence of biopterin-α-glucoside. Although the chromophore of phycocyanin is related to phycocyanobilin and protein conformation, the chromophore can be stabilized to UV light in the presence of biopterin-α-glucoside. |
| Databáze: | OpenAIRE |
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