Evidence for Distinct Amino Acid Transport Systems in Cultured Tobacco Cells
Open Access
- 1 October 1978
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung C
- Vol. 33 (9-10) , 641-645
- https://doi.org/10.1515/znc-1978-9-1006
Abstract
Tobacco [Nicotiana tabacum cv. Xanthi] cell lines have distinct transport systems for L-amino acids. For all tested amino acids the Lineweaver-Burk plots were diphasic indicating the presence of more than 1 carrier for any one amino acid. Distinct transport systems for neutral, acidic and basic amino acids were kinetically characterized. Based on competition experiments neutral amino acids were absorbed by all transport systems. Aspartic acid entered the cells via its own carrier and via the basic carrier while arginine was taken up only by the basic carrier. Neutral amino acids such as L-leucine or L-phenylalanine were taken up faster than acidic or basic amino acids.Keywords
This publication has 2 references indexed in Scilit:
- Amino Acid Uptake by Amino Acid Analog Resistant Tobacco Cell LinesZeitschrift für Naturforschung C, 1978
- Evidence for a common component in kinetically distinct transport systems of Saccharomyces cerevisiaeMolecular Genetics and Genomics, 1977