Measurement of Protein Degradation in Leaves of Zea mays Using [ 3 H]Acetic Anhydride and Tritiated Water

  • Simpson E
  • Cooke R
  • Davies D
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Abstract

The rate of protein degradation in Zea mays leaves has been estimated by using tritiated water and [(3)H]acetic anhydride as the labeling agents. Both methods circumvent many of the problems usually associated with measuring protein degradation in plants. The half-life of ribulose-1,5-bisphosphate carboxylase protein in second leaves of 13-day-old seedlings under continuous light was found to be 7.8 +/- 0.9 days by the tritiated water technique and 6.5 +/- 0.8 days by the [(3)H]acetic anhydride method. The half-lives determined under a 14-hour-light, 10-hour-dark photoperiod are 6.2 +/- 0.8 days with tritiated water and 5.4 +/- 0.4 days with [(3)H]acetic anhydride. Whereas the values obtained by the two methods do not differ significantly, the use of either method for the determination of protein half-life can be recommended.

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Simpson, E., Cooke, R. J., & Davies, D. D. (1981). Measurement of Protein Degradation in Leaves of Zea mays Using [ 3 H]Acetic Anhydride and Tritiated Water. Plant Physiology, 67(6), 1214–1219. https://doi.org/10.1104/pp.67.6.1214

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