By R. E. Spier, J. B. Griffiths, W. Berthold
Most crucial for potential and filthy rich animal telephone know-how is the success of winning items therefore growing profit for sufferers and credibility for the industrial allure of this particularly younger know-how. The papers awarded during this quantity deal with the most recent concerns and glance to destiny advancements within the fields of animal telephone know-how. very important subject matters thought of in those displays contain downstream processing and regulatory protection facets. The twelfth ESCAT assembly complaints proceed to supply an entire evaluate of this crucial subject and may be a useful reference resource for these fascinated about the construction and use of animal cells
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Extra info for Animal Cell Technology. Products of Today, Prospects for Tomorrow
Is it possible to reduce the number of lines to be screene d as we proceed through these three stages ? The variability of such cell lines, therefore, was investigated further. A typical frequency distribution for the SPRs determined for sibling GS-NSO recombinant myeloma cell lines obtained after transfection is presente d in Figure 3. These distributions show that a large number of the cell lines are low producers whereas a relatively small number of cell lines gave high specific production rates, seven out of thirty-eight in this case.
Wurm: No, we have not done these experiments. 9Kd A-type sequence did provide the same results as the C-type sequence. Silberklang: Have you tried amplifying any of the homologously recombinant clones? Do they amplify equivalently or worse? Can you say anything about the 2 0 00 copy high amplification and whether it correlates with the position in the chromosome? Wurm: We have started some amplification with these but only limited selection in low levels of methotrexate, and we have seen further improvement in productivity but we have not yet selected for thousands of copies.
H. et al. (1989) Yale J. Biol. Med. 62: 131-139. 3. , etal. (1989) Diagn. Microbiol. Infect. Dis. 12: 327-332. 4. Land, H. et al. ) 304: 596-602. 5. E. ) 304: 602-606. 6. M. et al. (1986) Exp. Cell. Res. 166: 391-398. Acknowledgements. C. G. are very grateful to Dr J. Stephenson for use of facilities, and to Mr. A. Fooks for advice and assistance with plasmid preparation. 51 Table 1. Immortalised cell lines-CPE caused by test viruses [% cultures showing CPE (total)] Parainfluenza 2. Parainfluenza 3.