S-04 Molecular Toxicology Leaded by Young Scientists 4 ∼Molecular Targets and Biological Systems Responsible for Toxic and Protective Cell Responses to Metals∼ S04-1 Vascular toxicity as a factor underlying the site-specific neuropathy caused by methylmercury S04-2 Arsenic biomethylation is obligatory for oxidative DNA damage but not for malignant transformation S04-3 The role and mechanism of changes in zinc transporters expression in cellular cadmium transport S04-4 Effect of cadmium on erythropoietin production