The proto-oncogene can become an oncogene by a relatively small modification of its original function. There are three basic activation types: *A mutation within a proto-oncogene can cause a change in the protein structure, causing – an increase in protein (enzyme) activity – a loss of regulation * An increase in protein concentration, caused by [...]
A proto-oncogene is a normal gene that can become an oncogene due to mutations or increased expression. Proto-oncogenes code for proteins that help to regulate cell growth and differentiation. Proto-oncogenes are often involved in signal transduction and execution of mitogenic signals, usually through their protein products. Upon activation, a proto-oncogene (or its product) becomes a [...]
A gene that causes normal cell to become cancerous either because the gene is mutated or because the gene is expressed at the wrong time in development. An oncogene is a gene that, when mutated or expressed at high levels, helps turn a normal cell into a tumor cell. Many abnormal cells normally undergo a [...]
Split gene is a gene whose continuity is interrupted. An interrupted gene (also called a split gene) is simply a strand of DNA that contains both introns and exons. Most higher-level eukaryotes have interrupted genes and have longer introns than exons, creating a gene that is longer than its coding region. Interrupted genes are also [...]
Generally fishes restrict their movements within small territorial limits and do not go out of their home ranges. However, a few species travel long distances moving from fresh to sea water or vice versa. This movement of a very large number of fishes for the purpose of feeding of spawning, is know as migration. It [...]
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