ISSN:
1432-2048
Keywords:
Carrier
;
mediated transport
;
Chloroplast
;
Leucine
;
Pisum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The uptake of leucine into isolated, intact, pea chloroplasts was investigated using the silicone oil centrifugation technique. The internal: external ratio of leucine exceeded unity at low external leucine concentrations. Uptake of leucine at different external concentrations showed passive diffusion and carrier-mediated transport components. Competition for uptake was shown between leucine and isoleucine but not between leucine and glycine. Rates of diffusion of leucine were found to be low compared with glycine, however, fast carrier-mediated transport of leucine assumed more importance at physiological concentrations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00396190