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Secretion is the process of elaborating and releasing chemicals from a cell, a secreted chemical substance or amount of substance. In contrast to excretion, the substance may have a certain function, rather than being a waste product.Secretion in bacterial species means the transport or translocation of effector molecules for example proteins, enzymes or toxins (such as cholera toxin in pathogenic bacteria for example Vibrio cholerae) from across the interior (cytoplasm or cytosol) of a bacterial cell to its exterior. Secretion is a very important mechanism in bacterial functioning and operation in their natural surrounding environment for adaptation and survival.
Contents
- 1 Secretion in eukaryotic cells
- 1.1 Mechanism
- 1.1.1 Nonclassical secretion
- 1.2 Secretion in human tissues
- 2 Secretion in Gram negative bacteria
- 2.1 Type I secretion system (T1SS or TOSS)
- 2.2 Type II secretion system (T2SS)
- 2.3 Type III secretion system (T3SS or TTSS)
- 2.4 Type IV secretion system (T4SS or TFSS)
- 2.5 Type V secretion system (T5SS)
- 2.6 Type VI secretion system (T6SS)
- 2.7 Twin-arginine translocation
- 2.8 Release of outer membrane vesicles
- 3 Secretion in Gram positive bacteria
- 4 References
- 5 Bibliography
- 6 See also
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