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Diverse forms of mercury (Hg) have various effects on animals and humans because of a variety of routes of administration. Inorganic mercury (iHg) binds to thiol groups of proteins and enzymes in one’s body or is methylated by microorganisms. Organic form of Hg, contrary to the iHg, is more stable but may be demethylated to Hg2+ in the tissue of intestinal flora. Selenium (Se) also occurs in a variety...
For a very long time, RNA was considered just the medium by which information flows from DNA into the celi. The model proposed in the 1960s assumed that proteins are the main products and regulators of the gene expression process. In this context, the results of the Human Genome Project and the discoveries of RNA interference and small regulatory RNAs (srRNAs) came as a true surprise. The first ones...
For a very long time, RNA was considered just the medium by which information flows from DNA into the cell. The model proposed in the 1960s assumed that proteins are the main products and regulators of the gene expression process. In this context, the results of the Human Genome Project and the discoveries of RNA interference and small regulatory RNAs (srRNAs) came as a true surprise. The first ones...
Nervous system is characterized by its uniqueness in cells origin, their variability, electrical properties of the nervous cell membrane, response to external signals, neuronal network and changes in synapses activity that are the basis of higher brain functions, such as learning and memory. Brain is a superior organ of human body with an extremely efficient regulation system. Apart from protein and...
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