| 41. | This oligomerization has also been implicated in fusion initiation with the membrane of the target cell.
 
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 | 42. | Target cell death without added complement after cooperation of 7s antitumour antibodies with non immune lymphocytes.
 
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 | 43. | Genetic engineering involves piercing the walls of target cells and introducing altered DNA into the cells'interior.
 
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 | 44. | Their effect on target cells is usually inhibitory.
 
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 | 45. | And their many target cells made new connections.
 
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 | 46. | Another approach is to mutate receptor genes until mTCRs emerge that bind to particular target cells.
 
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 | 47. | A concerted conformational change within each monomer then results in two membrane of the target cell.
 
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 | 48. | They've also perfected new techniques for getting more of the virus to infect the target cells.
 
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 | 49. | CD4 receptor ) on the target cell.
 
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 | 50. | The target cells then release a flood of chemicals, called trophic factors, that strengthen the incipient connections.
 
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