Figure 4.

Cry1Ac protein content of 19 6-year-old transgenic lines detected using ELISA. Cry1Ac protein content are listed from highest to lowest. The toxic protein content varied greatly among the 19 6-year-old transgenic lines from 0.00 to 86.62 ng g⁻¹ FW. Data are means ± SD of three replicates. Error bars represent the standard deviation of the mean. Different letters above the bars indicate a statistically significant difference between the transgenic lines at the P < 0.05 level according to Duncan's multiple range test.