Figure 3.

Total and 20S proteasome activities in starved and non-starved maize root tips. A, Chymotrypsin-like, trypsin-like, PGPH, and caseinolytic total activities were measured in desalted crude extracts of non starved (T0), 24-h Glc-starved (T24 starved), and 24-h Glc-fed (T24 + Glc) root tips. B, The 20S proteasome activities were determined after immunoprecipitation of desalted crude extracts with anti-20S proteasome antibodies. For each activity, the percentage of total activity because of the 20S proteasome is reported in C. n.d., Non-detected, because of the detection limit of the immunoprecipitation method. Values are means of six independent experiments.