Young leaf tissue from plants of the two lines expressing the highest levels of ACC deaminase were used in ethylene generation assays. As shown in Table 1, in the line best expressing ACC deaminase, 5673, ethylene was reduced by 90%. In a second experiment, this line exhibited ethy ene reductions of greater than 97%. The line with the second-best ACC deaminase expression level, 5854, showed a reduction in ethylene of 78%. These data are consistent with the gene expression data. Line 5673 con- tained approximately 0.5% of the soluble protein in ACC