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Clark O, Schmidt F, Coles CH, Tchetchelnitski V, Stoker AW. Functional Analysis of the Putative Tumor Suppressor PTPRD in Neuroblastoma Cells. Cancer Invest 2012; 30:422-32. [DOI: 10.3109/07357907.2012.675383] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- O. Clark
- Neural Development Unit, UCL Institute of Child Health, University College London,
London, UK,1
| | - F. Schmidt
- MERCK SERONO S.A.,
Geneve, Switzerland,2
| | - C. H. Coles
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford,
Oxford, UK3
| | - V. Tchetchelnitski
- Neural Development Unit, UCL Institute of Child Health, University College London,
London, UK,1
| | - A. W. Stoker
- Neural Development Unit, UCL Institute of Child Health, University College London,
London, UK,1
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Abstract
The extraction of enzymes concerned with malic acid metabolism from succulent plants, notably Bryophyllum calycinum, has been made possible by the introduction of a new technique. The high concentration of organic acids in the vacuoles of leaf cells was neutralized in situ by vacuum infiltration with ammonia solution. Thus, during maceration, the enzyme proteins are neither precipitated nor inactivated and conventional methods of enzyme purification may be applied. Further experiments have shown that whereas B. calycinum plants may lose their ability to fix carbon dioxide actively in the dark following exposure to short days ([Formula: see text] hours) the enzymes involved in malic acid metabolism and carbon dioxide fixation in the dark are not necessarily depleted.
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