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Micrococcal nuclease (MNase) digestion time course of Mytilus galloprovincialis’ sperm chromatin. Analyses of DNA by electrophoresis on agarose gel: unexposed and exposed mussels to 1 pM HgCl2 (Panel (a)), exposed mussels to 10 and 100 pM HgCl2 (Panel (b)). n.d. = undigested sperm genomic DNA. 1Kb and 100 bp: molecular weight markers.
