“…Until recently the lack of genomic data available for mussel (Venier et al, 2003) has confounded development of novel biomarkers at the nucleic acid level. However, discovery of novel biomarkers using suppression subtractive hybridisation (SSH) has been shown to be highly useful in aquatic vertebrates (Blum et al, 2004;Brown et al, 2004a;Brown et al, 2004b;Sheader et al, 2004) where no genomic data are available. The usefulness of this methodology in aquatic invertebrates was assessed using SSH and a nylon macroarray to investigate altered gene expression in digestive gland of Mytilus edulis in response to exposure to benzo[a]pyrene (BaP).…”