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Extensive insight into copper homeostasis has recently emerged. The Gram-positive bacterium Enterococcus hirae has been a paradigm for many aspects of the process. The cop operon of E. hirae consists of four genes that encode a repressor, CopY, a copper chaperone, CopZ, and two CPx-type copper ATPases, CopA and CopB. CopA and CopB accomplish copper uptake and export, respectively, and the expression...
Cu is an essential trace element capable of producing toxic effects in animals and man when ingested acutely or chronically in excess. Although chronic Cu exposure is increasingly recognized as a public health issue, its early effects remain largely unknown. We approached the significance of a moderate chronic Cu load in young rats to correlate early hepatic histopathological changes with functional...
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