Bromoperoxidase activity and vanadium level of the brown alga Ascophyllum nodosum |
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Authors: | Hartung Jens Brücher Oliver Hach Diana Schulz Heiko Vilter Hans Ruick Gunter |
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Institution: | a Fachbereich Chemie, Organische Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße, D-67663 Kaiserslautern, Germany b Zurmaiener Straße 16, D-54292 Trier, Germany c Landesamt für Verbraucherschutz Sachsen-Anhalt, Fachbereich 3 Lebensmittelsicherheit, Postfach 200857, D-06009 Halle (Saale), Germany |
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Abstract: | Vanadium-dependent peroxidase activity in extracts of Ascophyllum nodosum growing in the intertidal region close to Roscoff/France, and algal vanadium levels, followed approximately similar seasonal variation, as deduced from a study lasting from April 2005 to March 2006. High peroxidase (PO) activity was found in extracts obtained from algae collected in between midwinter to spring ∼100-190 U per g dry mass (dm), triiodide assay] with a maximum in April. Periods of reduced PO activity lasted from summer to early winter (∼50-90 U per g dm). High vanadium levels (1.5-2.2 mg kg−1 dm) were found in algae collected from midwinter to spring, whereas reduced levels (0.6-1.4 mg kg−1 dm) were found in summer to early winter. |
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Keywords: | AdSV adsorptive stripping voltammetry A n I and A n II bromoperoxidase isoenzymes I and II from Ascophyllum nodosum BPO bromoperoxidase dm dry mass HMDE hanging mercury drop electrode ICP-MS inductively coupled plasma mass spectrometry |
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