The turning of all or part of an organism in a particular direction in response to an external stimulus.‘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.’
- ‘An envelope glycoprotein on the surface is thought to be responsible for mediating viral entry into cells, tissue tropism, and host range.’
- ‘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.’
- ‘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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