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. 1979 Mar;63(3):583–585. doi: 10.1104/pp.63.3.583

Derepression and Repression of Lysine-sensitive Aspartokinase during in Vitro Culture of Carrot Root Tissue 1

Katsuhiro Sakano a
PMCID: PMC542874  PMID: 16660771

Abstract

The increment of lysine-sensitive aspartokinase (EC 2.7.2.4) activity during in vitro culture of carrot (Daucus carota, cv. Oogata sanzun) root tissue was explained in terms of derepression caused by an earlier decrease in the endogenous level of lysine, a possible end product repressor. Tissue content of free lysine decreased to about one-third of the initial level after 1 day of culture and no lysine was detected in the 2nd day. Inclusion of lysine (0.1 to 1.0 millimolar) in the culture medium resulted in a specific suppression of increase in lysine-sensitive aspartokinase activity without affecting the increase in threonine-sensitive aspartokinase activity.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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