The inserted cry1Ac gene encoded an insecticidal protein similar to a full length Cry1Ac protein with some minor changes arising from the design of the gene. The encoded Cry1Ac plant produced protein was 99.4% homologous to the native protein from B. thuringiensis subsp. kurstaki HD73.
Southern blot analyses of genome DNA from line 531 demonstrated that two copies of the T-DNA insert were integrated in a head-to-tail arrangement. One T-DNA insert contained a full-length cry1Ac gene and the NPTII encoding gene, and the second insert contained an inactive 3’ portion of the cry1Ac gene. The two inserts were linked and segregated as a single locus. Similar analyses demonstrated that the ori322 region, present in PV-GHBK04, was not transferred into the 531 genome. The aad gene was present but was not expressed since it was under the control of a bacterial promoter.