GENTECH archive


Re: Recalling GMOs, Labelling and safety

Tuesday 18 May 1999 Dr. Roush wrote:

>>Herve wrote:
>>I've learnt recently that the coding sequence inserted is not
>>exactly the very same as the one in the natural Bt (i've not
>>put quotes around natural !).
>Herve: The protein produced is exactly the same as by the bacteria;
>is, the amino acid sequence is exactly the same.  In any case, again
for Bt
>cotton, there is no Bt or DNA in the oil, nor any difference in the
>composition of the oil.

I'm sorry but that is not completely correct:
The gene expressed in corn is a truncated* version of the Bacillus
thuringiensis toxin and the smallest fragment that still possesses
toxicity to insects. (Reference: M. Vaeck et al. Nature 328, 33-37,

Heine Deelstra

* Truncated at both (5'&3') ends.