1. a Department of Biological Sciences , University of Salford , Salford, M5 4WT, UK
2. b Department of Biochemistry , Wageningen Agricultural University , Wageningen, The Netherlands
3. c Department of Chemistry and Applied Chemistry , University of Salford , Salford, M5 4WT, UK
4. d Cortecs Diagnostics Ltd, Techbase 1, Newtech Square Deeside Industrial Park, Deeside , Clwyd, CH5 2NT, UK
5. e National Rivers Authority (Yorkshire Region) , Rivers House, 21 Park Square South, Leeds, LSI 2QG, UK