Immunoblots were probed using antibodies
recognizing δ-zein. Lane 1 is a control with no cross-linking
reagents added. In lanes 2 through 7, 1-g samples of starch granules
were incubated with cross-linking reagents as follows: Caffeic acid
levels, 0.02, 0.1, 0.2, 1, 2, and 10 mm, respectively; and
potassium peroxymonosulfate levels, 0.005, 0.025, 0.05, 0.25, 0.5, and
2.5 mm, respectively. Each lane contained the total protein
extracted from 5 mg of isolated granules.