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The turning of all or part of an organism in a particular direction in response to an external stimulus.
- ‘It has a wide cell tropism and remains extra-chromosomal, therefore minimising the risk of insertional mutagenesis.’
- ‘Clearly, such a rise in genetic diversity may also have important phenotypic implications, such as the emergence of viruses with altered antigenicity, virulence, or tissue tropism.’
- ‘An envelope glycoprotein on the surface is thought to be responsible for mediating viral entry into cells, tissue tropism, and host range.’
- ‘This protein is embedded in and extends exterior to the viral lipid membrane and is primarily responsible for host cell receptor binding and host cell tropism.’
- ‘Our data demonstrate that factors in addition to the amount of PrP expressed determine the tropism of prions for certain tissues.’
Late 19th century: from Greek tropos ‘turning’ (from trepein ‘to turn’) + -ism.
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