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					19 December 2001 Salmonella One strain of the bacteria causes typhoid, the other causes food poisoning. 19 December 2001 Antibiotics binding in cells A detailed knowledge of where antibiotics bind is central to understanding the mechanisms of drug action. 19 December 2001 Anthrax Nature has published two papers about the bacterial toxin that causes anthrax. 19 December 2001 Stem cell Nature supplement Scientists face the task of bringing stem cell therapies to the clinic. 19 December 2001 Mammalian heritage has deep roots molecular evidence suggests that placental mammals existed long before dinosaurs died out. 19 December 2001 Salmonella's binding domain Type III protein-secretion mechanisms may represent a target for many diseases. 19 December 2001 Virus therapy for cancer Researchers optimise a strategy for killing tumours using a novel type of engineerd adenovirus.		19 December 2001 Sheep more intelligent than previously thought Possible evidence for 'emotions' in sheep. 19 December 2001 Controlling immune responses Cells that initiate immune reactions also elicit regulatory cells to help police the ensuing response. 19 December 2001 Antibiotics found in mast cells of fish Nature reports the discovery in fish of a previously unknown family of antibiotics, called piscidins. 19 December 2001 Interferon-alpha producing cell identified in mice Interferon-alpha plays a crucial role in limiting early virus spread. 19 December 2001 Parasite genome strip-tease This severe reductionism has nearly erased the genomic record of the organism's evolutionary history. 19 December 2001 Skin makes antibiotics The first direct in vivo evidence for the physiological relevance of any antibiotic peptide. 19 December 2001 Heredity journal to be published by Nature The journal publishes key papers on ecological, population and evolutionary genetics.